AP Chemistry

What volume of each of the following bases will react completely with 21.00 mL of 0.500 M HCl?
(a) 0.100 M NaOH
(b) 0.0500 M Ba(OH)2
(c) 0.250 M KOH

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  1. moles acid or base = M x L = ??
    Next use the coefficients in the balanced equation to convert moles acid/base to the other one. The M = moles/L. Here is an example using (a).
    HCl + NaOH ==> NaCl + HOH
    moles HCl = M x L = 0.500M x 0.021L = 0.0105.
    moles NaOH = 0.0105 x (1 mole NaOH/1 mole HCl) = 0.0105 moles NaOH
    M NaOH = moles NaOH/L NaOH. You know M NaOH and moles NaOH, solve for L NaOH and convert to mL.

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