HCl + NaOH ==> NaCl + H2O
mols NaOH = M x L =?
Using the coefficients in the balanced equation, convert mols NaOH to mols HCl.
Then M HCl = mols HCl/L HCl.
Solve for M HCl.
By titration it is found that 20.5 mL of 0.168 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution
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