150.0 mL of 0.2105 M nitric acid was added to 1.3415 g calcium carbonate. The excess acid was back titrated with 0.1055 M sodium hydroxide. It required 75.5 mL of the base to reach the end point. Calculate the percentage (%w/w) of calcium carbonate in the sample. HNO; + NAOH NaNO3 + H2O 2HNO3 + CaCO3- Ca(NO3)2 + H2O + CO2

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150.0 mL of 0.2105 M nitric acid was added to 1.3415 g calcium
carbonate. The excess acid was back titrated with 0.1055 M sodium
hydroxide. It required 75.5 mL of the base to reach the end point.
Calculate the percentage (%w/w) of calcium carbonate in the sample.
HNO3 + NaOH
NANO3 + H20
2HNO3 + CaCO3 Ca(NO:)2 + H2O + CO2
Transcribed Image Text:150.0 mL of 0.2105 M nitric acid was added to 1.3415 g calcium carbonate. The excess acid was back titrated with 0.1055 M sodium hydroxide. It required 75.5 mL of the base to reach the end point. Calculate the percentage (%w/w) of calcium carbonate in the sample. HNO3 + NaOH NANO3 + H20 2HNO3 + CaCO3 Ca(NO:)2 + H2O + CO2
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