Question

Refer to the graphs to compare the rate of this reaction with and without a catalyst. 
Which best describes the role of a catalyst in the rate of a reaction?    

A.Catalysts increase the activation energy required for a reaction, thus slowing the reaction rate. 

 B.Catalysts increase the activation energy required for a reaction, thus increasing the reaction rate.  

C.Catalysts lower the activation energy required for a reaction, thus slowing the reaction rate.  

D.Catalysts lower the activation energy required for a reaction, thus increasing the reaction rate.

Answer 1

A catalyst lessens the energy for a reaction so it can speed up so the  catalyst is not used up in the end of the reaction so the answer would be D.

Answer 2

D,the answer is D.i hope that helped.:)