Answer to Question #151156 in General Chemistry for sewar

Question

Chlorine is used by manufacture to bleach cloth.
Na2S2O3 + 4Cl2 + 5H2O 2NaHSO4 + 8 HCl
How many kg of NaHSO4 (120) can be produced from 2.5kg of Na2S2O3(158) and how many kg
of HCl(36.5)?

Answer 1

2.5 kg = 2500 g

Moles of Na₂S₂O₃:

2500 g / 158 g/mol = 15.82 mol

According to the equation:

Na₂S₂O₃ + 4Cl₂ + 5H₂O = 2NaHSO₄ + 8HCl

Moles NaHSO₄ = 2 moles Na₂S₂O₃ = 15.82 mol x 2 = 31.6 mol

Mass = 31.6 mol x 120 = 3797.5 g = 3.8 kg

Moles HCl = 8 moles Na₂S₂O₃ = 15.82 mol x 8 = 126.6 mol

Mass = 31.6 mol x 36.5 = 4620 g = 4.62 kg

Answer: 3.8 kg NaHSO₄; 4.62 kg HCl.