In a titration, 3.4 g of an acid (HX) requires 21.5 mL of 0.85 M NaOH(aq) for complete reaction. What is the molar mass of the acid? Answer in units of g/mol. im not really sure how to even start... but i calculated the moles of NaOH which i got to be .018 moles.... what do i do from here?

Answer 1

HX + NaOH ==> NaX + H2O
moles NaOH = M x L = ??
moles HX must be the same since the reaction is 1:1.
moles HX = grams/molar mass.
You know moles HC and grams HX, solve for molar mass HX.

Answer 2

I got 186.04 g/mole... did i do that right?

Answer 3

never mind, thank you :)