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Grade 10Physical Chemistry

Calculate the percentage of water of crystallization in Washing Soda

Suchana Chatterjee

8 Years agoGrade 10

1 Answer

Sujit Kumar

8 Years ago

Washing Soda (Hydrous) = Na₂CO₃.10H₂O

M.W of Na₂CO₃.10H₂O = 2(23) + (12) + 3(16) + 10(18) =46 + 12 + 48 + 180 = 286

M.W of H₂O in Na₂CO₃.10H₂O = 10(18) = 180

$\frac{w}{W}\%=\frac{180}{286}\times 100$

$\rightarrow \frac{w}{W}\%=0.62937\times 100$

$\rightarrow \frac{w}{W}\%=62.937\%$

Ans: 62.9%

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