Kinetic data are normally presented as graphs. The following questions test your

Question

Kinetic data are normally presented as graphs. The following questions test your knowledge about labeling and interpreting graphs correctly. [B] is used to represent the concentration of a reactant B in a reaction. Decide if each of the following statements is True or False.

Decide if each of the following statements is True or False.

True False  Consider graph C: if y = [B] and x = time, the graph could represent a first order reaction.
True False  Consider graph D: if y = ln[B] and x = time, the graph could represent a second order reaction.
True False  Consider graph C: if y = 1/[B] and x = time, the graph could represent a second order reaction.
True False  Consider graph A: if y = [B] and x = time, the graph could represent a first order reaction.
True False  Consider graph D: if y = 1/[B] and x = time, the slope is equal to -k.
True False  Consider graph B: if y = [B] and x = time, the graph could represent a second order reaction.

Explanation / Answer

i) Consider graph C: if y = [B] and x = time, the graph could represent a first order reaction.

False

Here, the graph could represent a zero order reaction

ii) Consider graph D: if y = ln[B] and x = time, the graph could represent a second order reaction.

False

iii) Consider graph C: if y = 1/[B] and x = time, the graph could represent a second order reaction.

False

Will have a positive slope

iv) Consider graph A: if y = [B] and x = time, the graph could represent a first order reaction.

True

v) Consider graph D: if y = 1/[B] and x = time, the slope is equal to -k.

False

Slope is equal to –k

vi) Consider graph B: if y = [B] and x = time, the graph could represent a second order reaction.

True

Here, rate = -dB / dt = k[B]2

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