Home

Give three conclusions that can be drawn about the rate of reaction

The initial rate is the instantaneous rate of reaction as it starts (as product just begins to form). Average rate is the average of the instantaneous rates over a time period. 3. rate = +1 2 Δ[CIF3] Δt = − Δ[Cl2] Δt = −1 3 Δ[F2] Δt rate = + 1 2 Δ [ CIF 3] Δ t = − Δ [ Cl 2] Δ t = − 1 3 Δ [ F 2] Δ t. 5 [10] What conclusions can draw about the effects of concentration, temperature and pH on the reaction rate after comparing the plots from the three different Procedures? [11] Choose one of the factors that impacts reaction rate (concentration, temperature, or pH) and, in your own words, provide a plausible biological explanation for your.

12.1 Chemical Reaction Rates - Chemistr

Mg (s) + 2HCl (aq) → MgCl 2 (aq) + H 2 (g) Students follow the rate of reaction between magnesium and the acid, by measuring the amount of gas produced at 10 second intervals. 3 cm of magnesium ribbon typically has a mass of 0.04 g and yields 40 cm 3 of hydrogen when reacted with excess acid. 50 cm 3 of 1M hydrochloric acid is a six-fold. O reactant O product not changing O speeding up O slowing down What conclusion can be drawn about the average rate of the reaction between points 1 and 2 and between points 2 and 3? The rate of the reaction between points 1 and 2 is faster than the rate of reaction between points 2 and 3 because the concentration of reactants increases Plot a graph of reaction rate (l/t) versus concentration of sodium thiosulfate. NThat conclusion can be drawn from the graph about the relationship between the rate of the reaction and the concentration of the sodium thiosulfate? Use your graph to predict the time taken for 50 cm3 of a 0.10 M solution of sodium thiosulfat To find the instantaneous rate of reaction at a given time: Plot a graph of concentration of reactant against time of reaction. It might look like this. I assume that each tick on the time axis represents 10 s. Mark a point on the graph that corresponds to a given time (say, 40 s). Draw a straight line (green) tangent to the curve at that point

Figure 1: Experimental set-up of HCl-Magnesium reaction. Results and Observations. During the reaction, the water bath in the gas delivery system showed gas bubbles ascending to the gas cylinder. At higher acid concentration, the rates of bubble forming were rapid than those in lower acid concentrations were Reaction Order. To reiterate, the exponents x and y are not derived from the balanced chemical equation, and the rate law of a reaction must be determined experimentally. These exponents may be either integers or fractions, and the sum of these exponents is known as the overall reaction order. A reaction can also be described in terms of the order of each reactant Give two conclusions you can make from Figure 5. [2 marks] 1 2 . 0 4 . 3 Colour A has an R f value of 0.65 Colour A moves 3.2 cm 0 8 A student investigated how temperature affects the rate of reaction between magnesium carbonate and dilute hydrochloric acid. This is the method used. 1. Heat hydrochloric acid to 30 ºC in a conical flask [10] What conclusions can draw about the effects of concentration, temperature, and pH on the reaction rate after comparing the plots from the three different Procedures? [11] Choose one of the factors that impact reaction rate (concentration, temperature, or pH) and, in your own words, provide a plausible biological explanation for your. 3 Is the evidence sufficient for you to draw a firm conclusion? (You can use evidence from others in your class too if necessary.) 4 Write a rate equation for the reaction. 5 Draw and complete a table, like the one below, to compare collision theory and rate equations as models for the rate of a reaction. Collision theory . Rate equatio

• Reaction rate slows/levels off. • Rate slows as substrate concentration declines (substrate used). • Enzyme inactive by about 40 minutes — enzyme loses activity over time (labile enzyme). • Product inhibition. (c) Draw and label another line on the graph to predict the results if the concentration of α-amylase was doubled. Explai 13 Findings, Conclusions, and Implications. Originating in a period of rising crime rates and social foment and driven by punitive sentencing policy, the steep increase in incarceration in the United States was carried out with little regard for an objective evaluation of benefits or possible harms 4 Give three conclusions that can be made from Figure 5. Draw one line from each pollutant to the environmental impact caused by the pollutant. [2 marks] 23 SPECIMEN MATERIAL Turn over 0 9 A student investigated the rate of reaction between marble chips and hydrochloric acid. Figure 9 shows the apparatus the student used

Summarizing Results and Drawing Conclusions 6. How can you effectively communicate your research findings to others? Effectively communicating your findings to others can be the most important and most challenging step of scientific research. Follow the steps below and try to answer the questions asked as they apply to your results Effect of concentration on the rate of reaction: When the concentration of a reactant increases, the rate of reaction also increases. Set I: 1 g of zinc powder and 20 cm 3 of 0.4 mol dm -3 hydrochloric acid at room temperature. Set II: 1 g of zinc powder and 20 cm 3 of 2 mol dm -3 hydrochloric acid at room temperature

What conclusions can draw about the effects of

Example of a decomposition reaction: CaCO 3 → CaO + CO 2. The reaction in which a compound decomposes due to heating is known as a thermal decomposition reaction. 3. Displacement Reaction. A chemical reaction in which a more reactive element displaces a less reactive element from its aqueous salt solution The start line should be drawn with a ruler and _____ . Give a reason for your answer. Suggest three conclusions you can make from the student's results. A student investigated the effect of temperature on the rate of a reaction For a forward reaction to be favored in a living cell, which of the following statements describes the relationship between Q and K? 1. The value of Q must be less than that of K. 2. The value of K must be less than that of Q. 3. No conclusion can be drawn about Q and K for a favorable process. 4

The rate of reaction can be calcu'ated using the formu'a: rate = time The reaction is considered to be complete when the percentage light intensity reaches 30%. Use the formula to find the mean rate for experiment A. State and explain, using particle theory, the conclusion you draw from the investigation (b) But, rate of reaction ∝ 1/time. (c) Hence, rate of reaction increases linearly with temperature. In other words, as the temperature increases, the rate of reaction also increases. Usually, the rate of a reaction approximately doubles for every 10°C rise in temperature

Figure 18.7. 1: Concentration versus Reaction Rate. (a) This graph shows the effect of substrate concentration on the rate of a reaction that is catalyzed by a fixed amount of enzyme. (b) This graph shows the effect of enzyme concentration on the reaction rate at a constant level of substrate. Let's consider an analogy Conclusions about Mechanism that can be Drawn from Kinetic Order 2 Conclusions about Mechanism that can be Drawn from Kinetic Order Elementary uni- and bimolecular reactions will necessarily show first- and second-order kinetic behaviour, but the reverse is not necessarily true a first-order reaction may not be unimolecular and a second-order reaction may not be bimolecular The \(\text{1}\):\(\text{10}\) solution is more concentrated and therefore this reaction proceeds faster. The greater the concentration of the reactants, the faster the average rate of the reaction. The average rate of the reaction can be measured by the rate at which the magnesium ribbon disappears • Using the results from the student's experiments, what conclusions can be drawn about the kinetics of this reaction? Justify yourreasoning. • Calculate the rate constant for this reaction, including theunits. In your answer you should make clear how your conclusions fit with the experimental results. [9] [Total:10Marks CONCLUSION. Based on the results obtained from the experiment it can be concluded that the concentration of enzymes influences the rate of a chemical reaction. If enzyme concentration is decreased then the reaction rate will also decrease

Suggest three conclusions you can make from the student's results-3 colours in Cola Give two reasons why the other questions cannot be answered by science alone-cannot be done by State the effect of increasing the pressure on the rate of reaction. Explain your answer in terms of particles.-rate increases-because particles are close Conclusion Enzymes are very efficient catalysts for biochemical reactions. They speed up reactions by providing an alternative pathway of lower activation energy. In this lab, an investigation was brought forward to discover the factors that can affect the enzyme during catalytic activity; the following conclusions were made from conducting the lab.. Methods. Mark the sheet of paper with an X. Measure out 10cm 3 of sodium thiosulphate solution into a flask. Add 40 cm 3 of distilled water into the solution. Warm the solution gently to about 25°C. Add 5 of hydrochloric acid. Note the temperature and the time. Swirl the contents of the flask and place the flask over the X on the paper At the end of this experiment, it can be concluded that the concentration does have an effect on the time taken for the reaction and consequently on the rate of reaction. More specifically, an increase in concentration leads to an increase in the rate of reaction. The following conclusions can therefore be drawn

6 For a reaction of half order ()n = 12 we get x A2 Da 2 3Da2 16 + Da 2 1 Da 2 + Da2 8 for system 1a x A2 ' = Da 1 + Da2 16 5Da2 16 for system 1b Da x A2 x A2 0.5 0.424 0.426 1 0.708 0.718 2 0.957 0.986 You should check the above expressions and draw your own conclusions by plotting x A2 and x A2 ' vs Da = Da 1/2 1/2= kt / C Ao Note: The overall rate of reaction isn't entirely independent of the concentration of B.If you lowered its concentration enough, you will eventually reduce the rate of the second reaction to the point where it is similar to the rate of the first. Both concentrations will matter if the concentration of B is low enough.. However, for ordinary concentrations, you can say that (to a good. Mechanism. The reaction is an example of electrophilic addition.The bromine is a very polarizable molecule and the approaching pi bond in the ethene induces a dipole in the bromine molecule.If you draw this mechanism in an exam, write the words induced dipole next to the bromine molecule - to show that you understand what's going on (iv) The rate of this reaction can be determined from this graph. Show on the graph how the rate can be measured after 1200 s. [1] (v) The rate can also be calculated from the rate equation. The rate constant for this reaction is 6.2 × 10-4 s-1. Calculate the initial rate of this reaction. State the units

Practical - effect of changing the conditions on the rate

Reaction 3: [H 2 O 2] = 0.0225 M; [KI] = 0.050 M. The concentrations of the other reactants remain constant. ( [H2SO4] = 0.10 M; [Na2S2O3] = 0.0028 M). By comparing the length of the induction periods, conclusions can be drawn regarding the dependence of the rate of reaction on the concentration of reactants (Using the average of the results obtained, the rate of reaction can then be studied by drawing graphs with the volume of gas produced (cm^3) as the dependent variable and the time (seconds) as the independent variable. A tangent should then be drawn to each of the curves at 45 seconds, and the gradient should then be worked out afterwards. Question 11 of 25 Reactants Products Reaction Progress Which of the following conclusions can be drawn from the curves in the energy diagram? O A. The molecules represented in curve A have higher kinetic energy than curve B. OB. The reaction represented by curve A requires less added energy than curve B. dh C 2 OCR 2017 Answer all the questions. 1 Fig. 1.1 shows the structure of the amino acid leucine. (a) (i) On Fig. 1.1, draw a circle around the R group of leucine. H H 3C C CH 3 H 2N COOH CH 2 C H Fig. 1.1 [1] (ii) Students used thin layer chromatography to separate leucine from other amino acids. The chromatogram they produced is shown in Fig. 1.2. origin solvent front Y X leucin

This page describes and explains the way that adding a catalyst affects the rate of a reaction. It assumes that you are already familiar with basic ideas about the collision theory of reaction rates, and with the Maxwell-Boltzmann distribution of molecular energies in a gas (b) But, rate of reaction ∝ 1/time. (c) Hence, rate of reaction increases linearly with temperature. In other words, as the temperature increases, the rate of reaction also increases. Usually, the rate of a reaction approximately doubles for every 10°C rise in temperature 2.2 Give a reason for the difference in reaction rate observed for Experiments 1 and 2. (1) 2.3 The learners compare the results of Experiments 1 and 3 to draw a conclusion regarding the effect of concentration on reaction rate. Give a reason why this is not a fair comparison. (1

In order to determine the rate law for a reaction from a set of data consisting of concentration (or the values of some function of concentration) versus time, make three graphs. [A] versus t (linear for a zero order reaction) ln [A] versus t (linear for a 1 st order reaction) 1 / [A] versus t (linear for a 2 nd order reaction (mol.dm-3) Rate of reaction (cm 3.s-1) 0,4 4,2 0,8 8,5 1,6 17,0 1.3. State THREE variables that must be controlled during this investigation. (3) 1.4. Write down an INVESTIGATIVE QUESTION for this investigation. (2) 1.5. Write down a conclusion that can be drawn from the results obtained. (2) 1.6. How will the rate of reaction change is lumps.

Ask Thucydides! (“The Baker Street Irregulars’ ‘ThucydidesCayman Eco - Beyond Cayman How It Feels Living in a City

Rate of reaction - Rates of reaction - AQA - GCSE Combined

  1. e the rate at which the reaction is taking place by using this formula:-RATE= 1 =0.0012. 837.9. There is a big difference in rates of reaction and scientifically proves that by diluting the acid you are decreasing the rate of reaction. These results fit the theory of collision. Conclusion
  2. give permission for the reaction. raise activation energy. speed up reactions. control how many reactions occur. Tags: Question 14 . SURVEY . 60 seconds . Q. Which of the following conclusions can be drawn from this graph? answer choices . The optimum pH of the enzyme is 6.6. The reaction rate will increase
  3. Saponification is the chemical reaction that makes soap. Zara Ronchi / Getty Images. While the one-step triglyceride reaction with lye is most frequently used, there is also a two-step saponification reaction. In the two-step reaction, steam hydrolysis of the triglyceride yields carboxylic acid (rather than its salt) and glycerol
  4. A reaction mechanism is the sequence of elementary steps by which a chemical reaction occurs. A reaction that occurs in two or more elementary steps is called a multistep or complex reaction. A reaction intermediate is a chemical species that is formed in one elementary step and consumed in a subsequent step
  5. ing Reaction Order, you learned that the integrated rate law for each common type of reaction (zeroth, first, or second order in a single reactant) can be plotted as a straight line.Using these plots offers an alternative to the methods described for showing how reactant concentration changes with time and deter
  6. For each set of results, draw a smooth line graph. Indicate clearly which line represents Experiment 1 and which line represents Experiment 2. (d) State which experiment had the faster rate of reaction and suggest why the rate was faster in this experiment. (e) From your graph, deduce the time required to collect 25cm 3 of gas in Experiment 1.

Rates of reaction Sodium Thiosulphate and Hydrochloric Acid. Download. Rates of reaction Sodium Thiosulphate and Hydrochloric Acid. Thomas Hutchins. Results Experiment numberTemperature ( 0 C) Time for X to disappear (s) (2) Draw a graph of temperature (x-axis) against 1/time (y-axis) (3) The experiment carried out is an investigation into rate. 3 5. The graph below shows the effect of substrate concentration on the rate of an enzyme-catalysed reaction. At which substrate concentration is the reaction rate equal to 75% of the maximum rate? A 5 units B 8 units C 12 units D 15 units 6. The reaction below is part of a metabolic pathway in cells. amino acids polypeptid The reaction orders for A, B, and C (or H 2 O 2, I-, and H +) can each be calculated, and the overall order of the reaction is the sum of each reactant's order.. d.) Determination of the rate constant. Once the orders of the reaction x, y, and z are determined, the experimental rate constant for each run is calculated by substituting known values for rate and concentration into the rate.

Solved: The Concentration Of X Over Time Is Shown In The G

3. vs. time; draw a smooth line through the points. Tape your graph to the blank page following Table B. _____ Answer the following questions in your notebook in the form of conclusions: 1. Does the reaction rate increase or decrease with dilution of one of the reactants? Give an explanation in terms of collision theory. 2 Plot the results in the table above on the grid in Figure 3 . Draw a line of best fit. (3) €€€€€Give one conclusion about how the rate of reaction changed when the concentration of Give two ways an enzyme can be denatured

Conclusions. Use Le Chatelier's principle to explain the changes that you recorded in the table above. Draw a conclusion about the effect of a change in concentration of either the reactants or products on the equilibrium position. Also draw a conclusion about the effect of a change in temperature on the equilibrium position After rearranging the expression defining K a, and putting pH = −log 10 [H +], one obtains = + ⁡ [] [] This is the Henderson-Hasselbalch equation, from which the following conclusions can be drawn.. At half-neutralization the ratio [A −] / [HA] = 1; since log(1) = 0, the pH at half-neutralization is numerically equal to pK a.Conversely, when pH = pK a, the concentration of HA is equal. (a) Write three characteristic properties of nuclear force. (b) Draw a plot of potential energy of a pair of nucleons as a function of their separation. Write two important conclusions that can be drawn from the graph. (All India 2015) Answer: (a) Nuclear forces Three days after Mody Shehab, a healthy 31-year-old, received his first dose of the Pfizer vaccine for COVID-19, he developed such severe chest pain he thought he was having a heart attack

The rate of reaction of magnesium with hydrochloric acid

A chemist carries out a series of experiments and determines the rate equation for this reaction: rate = (a) In one of the experiments, the chemist reacts together: 1.2 x 10-2mol dm-3H2(g) 6.0 x 10-3mol dm-3NO(g) The initial rate of this reaction is 3.6 x 10-2 mol dm-3s-1 Calculate the rate constant, k, for this reaction. State the units, if any The reaction rate that the enzyme has with the chemical reaction is usually directly proportional to the enzyme concentration [2]. Then, a product is formed. If the substrate is present in excess amounts, the reaction rate will increase in proportion to an increasing enzyme concentration, so that the available substrate does not limit the rate. Reactions of acids with metals. This is a short chapter to conclude the series of reactions that learners will have been exposed to this term. The last reactions to look at are those between an acid and a metal. At the end of this chapter, there is a short activity on some of the careers in the chemical industry €€€€€€€€€ The rate at which this reaction takes place can be studied by measuring the amount of carbon Plot the results in the table above on the grid in Figure 3 . Draw a line of best fit. (3) €€€€€Give one conclusion about how the rate of reaction changed when the concentration o Drying is a mass transfer process consisting of the removal of water or another solvent by evaporation from a solid, semi-solid or liquid.This process is often used as a final production step before selling or packaging products. To be considered dried, the final product must be solid, in the form of a continuous sheet (e.g., paper), long pieces (e.g., wood), particles (e.g., cereal grains.

The conclusion is drawn that reactions with surface-active reactants are subject to greater acceleration, as seen particularly at lower concentrations in systems of higher surface-to-volume ratios. These results highlight the key role that air-solution interfaces play in Katritzky reaction acceleration From the results gathered, the conclusion can be drawn that c tales is a reusable enzyme that works better in basic, cold environments and is denaturized when heated o much. The measuring systems used were not very accurate, especially using physical observations to measure the reaction rates An SNI reaction would take place, accompanied by an El reaction, affording a complex mixture of products. An E2 reaction would take place, during which the stereogenic center is lost. 14. Consider the substitution reaction that takes place when (R)-3-iodo-3-methylheptane is treated with sodium acetate (CH3C02Na). Which of the following would be.

help_outline. Image Transcription close. Draw all possible products that can be formed in the following reaction. What type of reaction is this? Compare these two reactions in terms of their conditions and products, what conclusion can you draw about these reactions? NABH4 A catalyst increases the reaction rate by providing an alternative pathway or mechanism for the reaction to follow . Catalysis will be discussed in greater detail later in this chapter as it relates to mechanisms of reactions. Figure 3. The presence of a catalyst increases the rate of a reaction by lowering its activation energy 23.3 The learners compare the results of Experiment 1 and 3 to draw a conclusion regarding the effects of concentration on the reaction rate. Give a reason why this is not a reasonable comparison. Experiment Reaction conditions Time Concentration HCl (mol.dm-3) (s) Temperature (oC) State of 1,2 g Before After Zn piece 1 0,5 20 34 granules 5 The longer the reaction took the slower it was reacting, the quicker the reaction took the faster the reaction was occurring so it would have a high reaction rate. The reaction rate is equal to one over the time it took. Reaction time will be measured in second and reaction rate s-1. Concentration increases the rate of reaction.. 3. Solvent: The rate of the reaction can be affected by the energy level of the reagents. Solvation is the surrounding of a species in a reaction by the solvent molecules themselves, creating a cage of solvent molecules. This can cause a reaction to go faster or slower, depending on what the solvent is surrounding

The concentration of X over time is shown in the Chegg

The knowledge base can be improved by (1) framing key hypotheses that can be tested by existing or new services, (2) building statistical models to explore the system-wide effects of selected interventions and compare these effects with the consequences of collaborative and comprehensive approaches, (3) using common definitions and measures to. What conclusions may be drawn from these observations? I. The reaction is first-order in A. II. The rate constant for the reaction is 0.0175/s. a. I only b. II only c. Both I and II d. Neither I. Experiment 3 The results from Experiment 3 are shown in the table. tests observations Aqueous sodium hydroxide was added to about 2 cm3 of solution C. green precipitate formed Aqueous sodium hydroxide was added to the reaction mixture saved from Experiment 1. red-brown precipitate formed (f) What conclusions can be drawn about solution C from.

Stereochemistry in the SN1 Reaction (7.4B) 7-26 Inversion and Retention of Configuration. Racemic Product. 7.5 Reaction Rates of SN Reactions 7-28 Reaction Rates (7.5A) 7-28 SN2 Reaction Rates. SN1 Reaction Rates. Activation Energies (7.5B) 7-29 Energy Diagram for an SN1 Reaction. SN1 Activation Energies 1) What conclusions can be drawn about the relationship between the arrangement of elements on the periodic table and the patterns observed in their properties? :Properties of elements are related to atomic numbers.*** :Properties of elements are related to ductility. :Properties of elements are related to malleability. :Properties of elements are related to luster. is it a Ms sue pls hel How to write a conclusion for your research paper. When writing your conclusion, you can consider the steps below to help you get started: Restate your research topic. Restate the thesis. Summarize the main points. State the significance or results. Conclude your thoughts. 1

Cayman Eco - Beyond Cayman In Tanzania, locals and

The rate of the reaction will be very much faster for pathway 2 than for 1. A catalyst, such as the platinum metal added to the H 2 /O 2 mixture, can cause the reaction to occur through a series of small steps and reduce the activation barrier. A catalyst is any substance that increases the rate of a chemical reaction by changing the reaction. 1.Reaction rate: Consider a reaction where two chemicals A‟ and B‟ react to form C‟ A+B C Halil, a student in the class, says: The reaction rate is the rate of formation of C‟ and it increases during time His friend Sabri disagrees: No, the rate of reaction shows the period of time that is required for a reaction to. There are three graphs which can be drawn using these results: 1. Variation oftime taken with temperature. 2. Variation of initial rate with temperature 3. AnArrhenius plot (which indicates activationenergy of ~ 47 kJ mol-1). Here are some results taken in the space of 45 minutes