What is the [H+] of an HCl solution if the pH is measured to be 6?

Select one:
a. 1 X 10-7 M
b. 1 X 10-6 M
c. 6 X 10-6 M
d. 8 X 10-1 M

Question

What is the [H+] of an HCl solution if the pH is measured to be 6?

Select one:
a. 1 X 10-7 M
b. 1 X 10-6 M
c. 6 X 10-6 M
d. 8 X 10-1 M

thadyoung · Answer

pH proportional to the -log of the hydrogen concentration.
In otherwords:
$\sf \color{red}{pH = -log[H^+]}$

therefore, using some algebra, you can solve for the acid concentration in your solution. 
Can you do that? This is simply solving for $\sf H^+$
Do you remember this from algebra - log rules?