2.50 g of Na2CO3.xH2O crystals were dissolved in water and made up to 1000 cm³ of solution. 25cm³ of this solution required 12.50 cm³ of 0.035 mol dm³ HNO3 for complete neutralisation.Calculate the value of x in Na2CO3.xH2O using the steps given below. Detailed working needs to beshown and where relevant answers must contain units.2HNO₁₂ + Na2CO3 →2NaNO, + CO. + H.O(a)Calculate the number of moles of Na,CO, in 25 cm³(b)Calculate the number of moles of Na,CO, in 1000 cm²(ejCalculate the mass of Na,CO, in 1000 cm³(d)Calculate the mass of water of crystallisation associated with this mass of Na₂COCalculate the moles of water of crystallisation associated with this mass of Na2CO3(e)Calculate the value of x in Na2CO3.xH₂O

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Chemistry

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ISBN:9781305957404

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Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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5
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15). If Ca(NO3) (aq) is slowly added to solution containing CO32– and SO42– what compound would precipitate out first given the solubility products (Ksp (CaSO4) = 2.4 x 10–5 and Ksp (CaCO3) = 8.7 x 10–9)? CaCO3 would precipitate first because it is least soluble. CaSO4 would precipitate first because it is least soluble. CaCO3 would precipitate first because it is more soluble. CaSO4 would precipitate first because it is more soluble.
1. Explain what is meant by the term Precipitate. 2. Calculate the solubility of Fe(OH)2 at 298 K in 1.0 mol dm³ NaOH given the solubility product constant (Ksp) of Fe(OH)2 at this temperature is 7.9 x 10-16 mol³ dmº.
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