Question

An unknown H2So4 sample of 25.00mL vl is titrated with 0.149 M NaOH. If 45.22mL of NaOH were needed to reach the pink endpoint, what was the molarity of the unknown acid? Show work using conversion factors?????

H2SO+2NaOH --> Na2SO4+2H2O

Dont know where or how to start!

Answer 1

First, this doesn't look like an organic chem question to me. I don't know any organic chemistry but this one I can work.
moles NaOH = Molarity NaOH x liters NaOH = ?
Convert moles NaOH to moles H2SO4 this way.
?mols NaOH x (1 mole H2SO4/2 moles NaOH = ?moles NaOH x 1/2 = x moles H2SO4.

Then M H2SO4 = moles H2SO4/L H2SO4
You know moles H2SO4 and L H2SO4, solve for M H2SO4.