Question

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 fourth

Answer 1

I believe it is A because if u do not use something that is strong it will be slow. Hope this helps.

Answer 2

The slowest reaction rate will be  "using a weak hydrochloric acid solution and whole pieces of chalk ."

What is the reaction rate?

The reaction rate or rate of reaction is the rate at which a chemical reaction occurs, defined as proportional to the increase in product concentration per unit time and the reduction in reactant concentration per unit time.

The majority of chalk is calcium carbonate. When this interacts with hydrochloric acid, carbon dioxide, calcium chloride, and water are produced. The rate is slower with a weak acid because there are fewer $H^{+}$ ions available to react. The reaction between weak hydrochloric acid solution and entire chunks of chalk has a low rate, which means the molecules interact at a slower rate than in a high rate reaction.

Hence the correct answer is A.

Learn more about reaction rate here

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