Write the equation and balance it.
mols NaOH = M x L = ?
Using the coefficients, convert mols NaOH to mols H3PO4.
The M H3PO4 = mols/L. You know mols and M, solve for L and convert to mL.
How many mL of .175M H3PO4 are needed to neutralize 15.00mL of .33M NaOH?
3 answers
Looks like the M1V1 = M2V2 to solve the problem....?
No. M1V1 = M2V2 won't do it. That works ONLY for solutions that are 1:1 in the reaction. This one is 3NaOH to 1 H3PO4.