Question

8. In a reaction mechanism, a substance that is produced in one step, and consumed in a later step is a(n):

Intermediate.

Tranistion state.

Catalyst.

Starting material.

9. A substance that is present before and after the reaction takes place, and may increase the reaction rate by changing its mechanism is a(n):

Catalyst.

Intermediate.

Starting material.

Product.

12. An intermediate in an acid-catalyzed esterification has a partial _____ charge at its tetrahedral carbon center.

positive

negative

13. Water acts as a _______ in an acid-catalyzed esterification reaction.

leaving group

catalyst

strong base

None of these answers are correct

14. The number of particles with enough energy to overcome a chemical activation barrier ______ with increasing temperature.

increases

decreases

remains the same

15. Because the pK_a values of water and alcohols are very similar, the equilibrium constant for esterification reactions is close to _.

1

10

0.1

0

Answer 1

Ans. 8 intermediate

Ans. 9 catalyst

Ans. 12 positive charge

Ans. 13 strong base

Ans. 14 increase

Ans. 15 equilibrium constant is 1