A decomposition reaction is found to be first order with respect to the reactant. What is the relationship between the rate and the concentration of the reactant?

A. The rate is directly proportional to the natural logarithm of the concentration.
B. The rate is inversely proportional to the square of the concentration.
C. The rate is directly proportional to the concentration.
D. The rate is inversely proportional to the common logarithm of the concentration.

Question

A decomposition reaction is found to be first order with respect to the reactant. What is the relationship between the rate and the concentration of the reactant?

 		A.	The rate is directly proportional to the natural logarithm of the concentration.
 		B.	The rate is inversely proportional to the square of the concentration.
 		C.	The rate is directly proportional to the concentration.
 		D.	The rate is inversely proportional to the common logarithm of the concentration.

joannablackwelder · Answer

http://chemwiki.ucdavis.edu/Physical_Chemistry/Kinetics/Reaction_Rates/First-Order_Reactions

vera_ewing · Answer

Hmm, okay. So I'm not sure between A and C. Which do you think?

joannablackwelder · Answer

For first order:
Rate=k[A]

joannablackwelder · Answer

That makes it directly proportional to the concentration.