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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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rjframe rjframe
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12 years ago
18.0 mL of 0.113 M sulfurous acid H2SO3 was titrated with 0.1015 M KOH.

1)At what added volume of base does the first equivalence point occur?

2)At what added volume of acid does the first equivalence point occur?
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wrote...
#1
12 years ago
H2SO3 + NaOH = NaHSO3 + H2O ( first equivalence point)
moles H2SO3 = 0.0180 L x 0.113 M=0.00203
Moles NaOH required = 0.00203
Volume NaOH = 0.00203 / 0.1015 M=0.0200 L => 20.0 mL

hope helps
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