Homework Help: Chemistry

Posted by Alexandra on Tuesday, January 31, 2012 at 8:47pm.

If the concentration of a reactant is decreased, will the speed of the reaction increase or decrease? Explain.

I understand that if the concentration of a reactant is INCREASED, the frequency of coliision increases, making the rate of reaction increase. How aboout when the concentration is decreased?

Chemistry - DrBob222, Tuesday, January 31, 2012 at 9:12pm
You are correct that increasing the concn increases the rate and for the very reasons you site. Then wouldn't you expect decreasing the concn would have just the opposite effect?
Chemistry - Alexandra, Tuesday, January 31, 2012 at 9:20pm
That is my guess, that decreasing the concnetration of a reactant will decrease the rate of the reaction because there is a decrease in the frequency of collisions. Am I right?
Chemistry - DrBob222, Tuesday, January 31, 2012 at 9:47pm
Yes, doesn't that make sense to you?
Chemistry - Alexandra, Tuesday, January 31, 2012 at 10:37pm
It does, thank you for the help! :)
Chemistry - Alexandra, Tuesday, January 31, 2012 at 11:06pm
It does, thank you for the help! :)

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