[OCR] 4

Topic: chemical-bonding-2

Define the terms order of reaction and rate constant. ![img-18.jpeg](img-18.jpeg) ![img-19.jpeg](img-19.jpeg) [19.0m]

Part 1: (a) (i) Define the terms order of reaction and rate constant. [2m]

Your Answer:

Upload Image

Part 2: (a) (ii) Use Fig. 4.1 to determine the order of reaction with respect to $∙ O H$ . [2m]

Your Answer:

Upload Image

Part 3: (a) (iii) Use Fig. 4.2 to deduce the order of reaction with respect to $C H_{3} C H O$ , and hence determine the value of the rate constant, $k$ , for the reaction. [3m]

Your Answer:

Upload Image

Part 4: (a) (iv) Hence, write the rate equation for the reaction in equation 1. [1m]

Your Answer:

Upload Image

Part 5: (a) (v) It is proposed that the reaction shown in equation 1 takes place in a single, elementary step. Using your answer in (a)(iv), suggest if you agree with this proposal, giving your reasons. [1m]

Your Answer:

Upload Image

Part 6: (a) (vi) Suggest how the presence of a catalyst would affect the magnitudes of the rate constant, $k$ , and activation energy, $E_{A}$ , of the reaction in equation 1. [1m]

Your Answer:

Upload Image

Part 7: (b) (i) Use the information given above to draw the first and second steps of the mechanism for the reaction between $∙ O H$ and $C H_{4}$ . [3m]

Your Answer:

Upload Image

Part 8: (b) (ii) Draw the labelled energy profile diagram for the first two steps of the reaction between $∙ O H$ and $C H_{4}$ . [2m]

Your Answer:

Upload Image

Part 9: (c) (i) Write the equation for the overall reaction. [1m]

Your Answer:

Upload Image

Part 10: (c) (ii) Using equations 2 and 3, deduce the role of $F e^{2 +}$ in the overall reaction. Explain your reasoning. [2m]

Your Answer:

Upload Image

Part 11: (c) (iii) Suggest a method of "quenching" the reaction, without changing the temperature. [1m]

Your Answer:

Upload Image

Back to Vault

Review

You're all caught up!

[OCR] 4

Part 1: (a) (i) Define the terms order of reaction and rate constant. [2m]

Your Answer

Marking Points

Part 2: (a) (ii) Use Fig. 4.1 to determine the order of reaction with respect to $∙ O H$ . [2m]

Your Answer

Marking Points

Part 3: (a) (iii) Use Fig. 4.2 to deduce the order of reaction with respect to $C H_{3} C H O$ , and hence determine the value of the rate constant, $k$ , for the reaction. [3m]

Your Answer

Marking Points

Part 4: (a) (iv) Hence, write the rate equation for the reaction in equation 1. [1m]

Your Answer

Marking Points

Part 5: (a) (v) It is proposed that the reaction shown in equation 1 takes place in a single, elementary step. Using your answer in (a)(iv), suggest if you agree with this proposal, giving your reasons. [1m]

Your Answer

Marking Points

Part 6: (a) (vi) Suggest how the presence of a catalyst would affect the magnitudes of the rate constant, $k$ , and activation energy, $E_{A}$ , of the reaction in equation 1. [1m]

Your Answer

Marking Points

Part 7: (b) (i) Use the information given above to draw the first and second steps of the mechanism for the reaction between $∙ O H$ and $C H_{4}$ . [3m]

Your Answer

Marking Points

Part 8: (b) (ii) Draw the labelled energy profile diagram for the first two steps of the reaction between $∙ O H$ and $C H_{4}$ . [2m]

Your Answer

Marking Points

Part 9: (c) (i) Write the equation for the overall reaction. [1m]

Your Answer

Marking Points

Part 10: (c) (ii) Using equations 2 and 3, deduce the role of $F e^{2 +}$ in the overall reaction. Explain your reasoning. [2m]

Your Answer

Marking Points

Part 11: (c) (iii) Suggest a method of "quenching" the reaction, without changing the temperature. [1m]

Your Answer

Marking Points

Review

Similar Problems

[OCR] 4

Part 1: (a) (i) Define the terms order of reaction and rate constant. [2m]

Your Answer

Marking Points

Part 2: (a) (ii) Use Fig. 4.1 to determine the order of reaction with respect to ∙OH. [2m]

Your Answer

Marking Points

Part 3: (a) (iii) Use Fig. 4.2 to deduce the order of reaction with respect to CH3​CHO, and hence determine the value of the rate constant, k, for the reaction. [3m]

Your Answer

Marking Points

Part 4: (a) (iv) Hence, write the rate equation for the reaction in equation 1. [1m]

Your Answer

Marking Points

Part 5: (a) (v) It is proposed that the reaction shown in equation 1 takes place in a single, elementary step. Using your answer in (a)(iv), suggest if you agree with this proposal, giving your reasons. [1m]

Your Answer

Marking Points

Part 6: (a) (vi) Suggest how the presence of a catalyst would affect the magnitudes of the rate constant, k, and activation energy, EA​, of the reaction in equation 1. [1m]

Your Answer

Marking Points

Part 7: (b) (i) Use the information given above to draw the first and second steps of the mechanism for the reaction between ∙OH and CH4​. [3m]

Your Answer

Marking Points

Part 8: (b) (ii) Draw the labelled energy profile diagram for the first two steps of the reaction between ∙OH and CH4​. [2m]

Your Answer

Marking Points

Part 9: (c) (i) Write the equation for the overall reaction. [1m]

Your Answer

Marking Points

Part 10: (c) (ii) Using equations 2 and 3, deduce the role of Fe2+ in the overall reaction. Explain your reasoning. [2m]

Your Answer

Marking Points

Part 11: (c) (iii) Suggest a method of "quenching" the reaction, without changing the temperature. [1m]

Your Answer

Marking Points

Review

Similar Problems

Part 2: (a) (ii) Use Fig. 4.1 to determine the order of reaction with respect to $∙ O H$ . [2m]

Part 3: (a) (iii) Use Fig. 4.2 to deduce the order of reaction with respect to $C H_{3} C H O$ , and hence determine the value of the rate constant, $k$ , for the reaction. [3m]

Part 6: (a) (vi) Suggest how the presence of a catalyst would affect the magnitudes of the rate constant, $k$ , and activation energy, $E_{A}$ , of the reaction in equation 1. [1m]

Part 7: (b) (i) Use the information given above to draw the first and second steps of the mechanism for the reaction between $∙ O H$ and $C H_{4}$ . [3m]

Part 8: (b) (ii) Draw the labelled energy profile diagram for the first two steps of the reaction between $∙ O H$ and $C H_{4}$ . [2m]

Part 10: (c) (ii) Using equations 2 and 3, deduce the role of $F e^{2 +}$ in the overall reaction. Explain your reasoning. [2m]