Calculate the amount of sediment substance that forms when the barium chloride solution is merged with a solution containing 7.1 g of sodium sulfate.
m (Na2SO4) = 7.1 grams;
m (draft) -?
Na2SO4 + BaCl2 = 2NaCl + BaSO4, – we solve the problem, relying on the composed reaction equation:
1) Find the amount of sodium sulfate contained in 7.1 grams:
n (Na2SO4) = m: M = 7.1 g: 142 g / mol = 0.05 mol;
2) We compose a logical equation:
if 1 mole of barium sulfate requires 1 mole of sodium sulfate,
then 0.05 mol of barium sulfate will require x mol of sodium sulfate,
then x = mol.
n (BaSO4) = 0.05 mol.
Answer: n (BaSO4) = 0.05 mol.
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