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Sodium carbonate is a reagent that may be used to standardize acids. In such standardization, it was found that a 0.302 g sample of sodium carbonate required 25.4 mL of a sulfuric acid solution to reach the end point for the reaction:
Na2CO3 (aq) + N2SO4 (aq) --> H2O (l) + CO2 (g) + Na2SO4 (aq)
What is the molarity of the H2SO4? What is the normality of the H2SO4?

2007-10-28 12:08:22 · 1 answers · asked by Anonymous in Science & Mathematics Chemistry

1 answers

Molar mass of sodium carbonate Na2CO3: 105.99 g/mol
Na2CO3(aq) + H2SO4(aq) --> H2O(l) + CO2(g) + Na2SO4(aq)
0.302g Na2CO3 = 0.00285 mol Na2CO3 => requires 0.00285 mol H2SO4 to react with.
0.00285 mol H2SO4 in 25.4 mL <==> 0.112 M H2SO4
Hence the molarity of the H2SO4: 0.112M, and the normality of the H2SO4: 0.224

2007-10-30 13:47:54 · answer #1 · answered by Hahaha 7 · 0 0

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