What is the molarity of HCL if it takes 16.5 mL of 0.100 M NaOH to titrate 10.0 mL of HCl?

Question

HCl + NaOH -> H2O + NaCl

molarity = moles of solute/liters of solution

Answer 1

mols NaOH = M x L = ?
mol HCl = mols NaOH (look at the coefficients in the balanced equation)
Then M HCl = mols HCl/L HCl.