## Video Module Post Assessment Question 12

Cole Elsner 2J
Posts: 88
Joined: Fri Sep 28, 2018 12:25 am

### Video Module Post Assessment Question 12

For this question I put that "The forward reaction rate is the same as the reverse reaction rate" was false, but it was marked wrong.
I thought the reverse reaction rate was 1/Kc, so I'm confused as to why this was incorrect. Thanks!

Albert Duong 4C
Posts: 66
Joined: Fri Sep 28, 2018 12:17 am
Been upvoted: 1 time

### Re: Video Module Post Assessment Question 12

K is the equilibrium constant and is the ratio of concentration or partial pressure of Product over Reactants (in the forward reaction) and Reactants over Products (in the reverse reaction) at equilibrium. K is associated with the reaction rate, but is different from the reaction rate because K is just the ratio of products to reactants (the reaction rate forward and reverse should be equal at equilibrium).

Amy Dinh 1A
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

### Re: Video Module Post Assessment Question 12

"12. For a chemical reaction that has reached equilibrium which statement is false?"
The question asked for you to select the false statement. You were correct that the forward reaction is the same as the reverse reaction rate, but that statement is not false.

Clarissa Cabil 1I
Posts: 66
Joined: Fri Sep 28, 2018 12:19 am

### Re: Video Module Post Assessment Question 12

You confused reaction rate with the equilibrium constant, K.

At equilibrium, the forward reaction occurs at the same rate of the reverse reaction. Therefore, the forward and reverse reaction RATES are equal.

However, we can say that the EQUILIBRIUM CONSTANT for the forward reaction is KC. This means that the EQUILIBRIUM CONSTANT for the reverse reaction is 1/KC.

Hope this helps!