Calculate W (Na2SO4) in solution after adding 161 g of Glauber’s salt to 239 g of water.
| June 9, 2021 | education
Given:
m (Na2SO4 10H2O) = 161 g
m (H2O) = 239 g
To find:
W (Na2SO4) =?
Decision:
1) Let’s write down the formulas by which we will solve the problem.
W = (m substance: m solution) x 100%
m solution = m substance + m solvent
2) Find the mass of the entire solution
m solution = 161 g + 239 g = 400 g
3) W (Na2SO4) = (161 g: 400 g) x 100% = 40%
Answer: W (Na2SO4) = 40%.
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