Homework Help: chemistry

Posted by Anonymous on Saturday, July 7, 2012 at 11:10am.

A 0.115-L sample of an unknown HNO3 solution required 31.1 mL of 0.100 M Ba(OH)2 for complete neutralization. What was the concentration of the HNO3 solution?

chemistry - DrBob222, Saturday, July 7, 2012 at 5:36pm
2HNO3 + Ba(OH)2 ==> Ba(NO3)2 + 2H2O

mols Ba(OH)2 = M x L = ?
convert mols Ba(OH)2 to mols HNO3 using the coefficients in the balanced equation. That is mols HNO3 = 2*mols Ba(OH)2
Then M HNO3 = mols HNO3/L HNO3.

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