Mulitple choice
What is the concentration of H^+ in solution given the [OH^-]= 1.32x10^-4
a)7.58x10^-11M
b)1.32x10^-11M
C)1.0x10^14M
d)not enough information
E)none of the above
5 answers
(H^+)(OH^-) = Kw = 1E-14
so is it c? how did u get that please show me how?
I honestly hope you're kidding.
The equation I wrote will work ALL problems with one of the two given and you want to calculate the other.
(H^+)(OH^-) = 1E-14
(1.32E-4)(OH^-) = 1E-14
(OH^-) = 1E-14/1.32E-4.
Just punch in the numbers on your calculator and turn the crank. Out comes the answer. It is not c.
The equation I wrote will work ALL problems with one of the two given and you want to calculate the other.
(H^+)(OH^-) = 1E-14
(1.32E-4)(OH^-) = 1E-14
(OH^-) = 1E-14/1.32E-4.
Just punch in the numbers on your calculator and turn the crank. Out comes the answer. It is not c.
As we are not given Kw in the question, my answer would have d)
Dr Russ may be right. I've done so many of these I just assumed Kw was known; perhaps my assumption was invalid. In any event, however, given Kw, which I gave in my response, you should be able to calculate one of the quantities when given the other.
1 answer