pH calculations question (1 Viewer)

[BabzBrah]

Hey just wondering when finding the pH of a solution, if the acid is diprotic or triprotic do you multiply concentration by the amount of hydrogens.

e.g. when calculating the pH of a 0.001mol/L H2SO4 solution would I first multiply 0.001 by 2
= 0.002 then find pH using that?
so -log(0.002) = 2.7 or would I just use 0.001?

 

[Hoskiies]

Just use 0.001

 

[someth1ng]

Just use 0.001

Wrong, again.

pH=-log[H+]

In H2SO4, it is diprotic and so, you do 2x[H2SO4].

In your case, you use pH=-log(0.002)