Enter the initial concentration, final concentration, and the time change into the calculator to determine the rate of disappearance of a reactant in a chemical reaction.
Rate of Disappearance Formula
The following formula is used to calculate the rate of disappearance:
Rate = (C_i - C_f) / Δt
Variables:
- C_i is the initial concentration (M)
- C_f is the final concentration (M)
- Δt is the change in time (seconds)
To calculate the rate of disappearance, subtract the final concentration from the initial concentration and divide by the change in time.
What is Rate of Disappearance?
The rate of disappearance in a chemical reaction refers to the rate at which a reactant is consumed over time. It is a measure of the speed of the reaction and is usually expressed in molarity per second (M/s). This rate can be used to understand reaction kinetics and to determine the order of a reaction.
How to Calculate Rate of Disappearance?
The following steps outline how to calculate the Rate of Disappearance.
- First, determine the initial concentration (C_i) of the reactant in molarity (M).
- Next, determine the final concentration (C_f) of the reactant in molarity (M).
- Next, determine the change in time (Δt) over which the reaction occurs in seconds.
- Next, gather the formula from above = Rate = (C_i – C_f) / Δt.
- Finally, calculate the Rate of Disappearance (Rate) in molarity per second (M/s).
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Initial concentration (C_i) = 0.5 M
Final concentration (C_f) = 0.3 M
Time change (Δt) = 120 seconds
