When 115 g of sodium hydroxide was dissolved in 300 g of water, a saturated solution was obtained.
| February 14, 2021 | education
When 115 g of sodium hydroxide was dissolved in 300 g of water, a saturated solution was obtained. Determine the mass fraction of alkali in this solution.
The mass fraction of a saturated alkali solution is.
W (NaOH) = m (NaOH) / m (solution) • 100%.
Where is the mass of the solution.
m (solution) = m (H2O) + m (NaOH) = 300 + 115 = 415 g.
W (NaOH) = 115 g / 415 g * 100% = 27.7%.
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