Calculate the mass of crystalline hydrate Na2So3 * 5H2O.
| November 28, 2020 | education
1. First you need to find the mass of sodium carbonate in the solution.
500: 100 = 5g falls on 1%, 10.6% falls on 10.6 * 5 = 53g
2.Mr (Na₂CO₃ * 10H₂O) = 286, and Mr (Na₂CO₃) = 106
2! Then make up the proportion
286g (Na₂CO₃ * 10H₂O) – 106g (Na₂CO₃)
X g (Na₂CO₃ * 10H₂O) -53g (Na₂CO₃)
X = (286 * 53): 106
X = 143g (Na₂CO₃ * 10H₂O)
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