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Chemistry: Reaction Rates

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Questions and Answers

What units are commonly used to express reaction rates?

mol/L

g/L

L/mole

M/s, M/min, or M/h (correct)

How do chemists typically measure reaction rates?

By performing theoretical calculations only

By guessing the concentration changes

By initiating the reaction, measuring reactant/product concentration, and calculating change over time (correct)

By using unrelated measurements

What is the general trend observed in the concentration of A and B during a chemical reaction?

Concentration of A increases, while concentration of B decreases

Concentration of A and B remain constant

Concentration of A decreases, while concentration of B increases (correct)

Concentration of A and B fluctuate randomly

How is reaction rate defined?

Change in concentration of reactant or product over time Signup and view all the answers

What does a graph of reactant or product concentration vs. time help to determine?

The progress and rate of the reaction Signup and view all the answers

Why do chemists plot concentration as a function of time during reactions?

To visualize how concentrations change as the reaction progresses Signup and view all the answers

What does the reaction rate calculated for the hydrolysis of aspirin indicate?

It is greatest during the first 10 seconds interval. Signup and view all the answers

Which substance is the actual pain-relieving and fever-reducing compound in the hydrolysis of aspirin?

Salicylic Acid Signup and view all the answers

What is the pH condition under which the hydrolysis of aspirin is much faster?

Acidic Signup and view all the answers

What happens to the reaction rate at pH 7.0 during the hydrolysis of aspirin?

It remains the same as at other pH levels. Signup and view all the answers

During the hydrolysis of aspirin, what factors have researchers been focusing on understanding?

The factors affecting reaction rate. Signup and view all the answers

What is represented by square brackets in the text discussing the hydrolysis of aspirin?

Molar concentrations Signup and view all the answers