00:01
All right, so let's begin this problem by writing out a generic expression for the reaction of acid.
00:07
So in weak terms, you would have ha goes to h plus plus a minus, and we can use the ph to figure out what the concentration of the h plus is at equilibrium.
00:18
Remember, ph is equal to the negative log of the concentration of h plus.
00:23
So if i want to find the concentration of h +, i do 10 raised to the negative ph.
00:30
And in this case, the ph is 4 .51.
00:33
So i will do 10 raised to the negative 4 .51.
00:39
And when i do, i get 3 .1 times 10 to the negative 5th.
00:45
Now, this ice table is going to start with none of these initially.
00:50
And the original concentration of the acid is 0 .323.
00:55
All right.
00:55
And we're going to be adding x to this...