<meta http-equiv="refresh" content="1; url=/nojavascript/"> Chemical Reaction Rate ( Study Aids ) | Chemistry | CK-12 Foundation
Dismiss
Skip Navigation

Chemical Reaction Rate

%
Progress
Practice Chemical Reaction Rate
Practice
Progress
%
Practice Now
Chemical Reaction Rate

Feel free to modify and personalize this study guide by clicking "Customize."

The rate, or speed, at which chemical reaction occur can vary widely. A reaction rate is the change in concentration of a reactant or product with time.

For example, say that substance A underwent a reaction with its concentration decreasing. The rate of reaction can be expressed as:

\text{rate}=-\frac{\Delta [A]}{\Delta t}=-\frac{[A]_{\text{final}}-[A]_{\text{initial}}}{\Delta t}

Note: delta (∆) means "the change in," the brackets around the A refers to the concentration in molarity (M) of A, and a negative sign is used in this case because we know that the concentration of A is decreasing.

If you started with 1.10 M of A and you only had 0.88 M after 15.0 seconds, what would the reaction rate be? (To check your answer, highlight the following: 0.015 M/s)

If your initial concentration of hydrochloric acid (HCl) is 2.14 and the rate of reaction after 11.0 seconds is 0.012 M/s, what is your final concentration of HCl? (To check your answer, highlight the following: 2.01 M)

You can click here to find more information on chemical reaction rates and check your answers.

Image Attributions

Explore More

Sign in to explore more, including practice questions and solutions for Chemical Reaction Rate.

Reviews

Please wait...
Please wait...

Original text