Posted by Bianca on Monday, May 3, 2010 at 1:46pm.
First the M of HCl must be determined from the titration with NaOH.
NaOH + HCl ==> NaCl + H2O
Since the molar ratio or the reactants is 1:1, one may use
mL x M = mL x M. Use that to determine M HCl.
Then go to the Ca(OH)2 solution.
2HCl + Ba(OH)2 ==> BaCl2 + 2H2O
Here the ratio of the reactants is not 1:1; therefore, a different approach must be used.
moles Ba(OH)2 = M x L.
Moles HCl = twice that (from the coefficients in the balanced equation).
moles HCl = M x L
You know moles and M, calculat L and convert to mL.
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