SCIENCE
CHEMISTRY
Question
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The mass of ethanedioic acid, H2C2O4 in 250 cm3 of0.25 mol dm-3 solution is
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5.625 g
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11.250 g
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22.500 g
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33.750 g
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Explanation:
Detailed explanation-1: -Thus, the mass of oxalic acid (H2C2O4. 2H2O) needed to prepare 250 ml, 1 M aqueous solution of oxalic acid is 3.15 grams.
Detailed explanation-2: -12.6 /4 = 3.15 g of crystals of oxalic acid should be dissolved in water and precisely 250 ml of the solution should be produced.
Detailed explanation-3: -Step 1: Determination of the molecular mass of Oxalic acid ( 2 H 2 O ) The molecular mass of oxalic acid = 126 g/mol. Step 2: Determination of the number of moles of Oxalic acid. Molarity = Number of moles of Oxalic acid = Step 3: Determination of the mass of Oxalic acid. Number of moles = Mass of Oxalic acid =
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