666 g of potassium hydroxide are dissolved in 1 kg of water. Calculate the mass fraction of KOH.
| September 14, 2021 | education
The mass of water is 1 kg.
The mass of potassium hydroxide is 666 g.
Determine the mass fraction of potassium hydroxide in this solution.
First, you need to convert the mass value to grams.
1 kg = 1000 g.
Next, we calculate the mass of the solution.
m solution = m H2O + m KOH.
m solution = 1000 + 666 = 1666.
Next, you should calculate the mass fraction of potassium hydroxide in this solution.
W = 666/1666 * 100% = 39.97%.
Therefore, the mass fraction of potassium hydroxide is 39.97%.
Answer: W = 39.97%.
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