Question

Hydrochloric acid reacts with calcium carbonate, or chalk.

Which would result in the slowest reaction rate?
A. using a weak hydrochloric acid solution and whole pieces of chalk
B. using a strong hydrochloric acid solution and crushed pieces of chalk
C. using a strong hydrochloric acid solution and pieces of chalk that were broken in half
D. using a weak hydrochloric acid solution and pieces of chalk that were broken in fourths

Answer 1

A. using a weak hydrochloric acid solution and whole pieces of chalk

Step-by-step explanation:

Answer 2

A. using a weak hydrochloric acid solution and whole pieces of chalk

Step-by-step explanation:

The higher the concentration, and the greater the surface area, the faster the reaction.

Therefore, a weak acid with whole pieces of chalk is going to have the slowest rate.