Sodium chloride 10 grams. You need to get a 10% sodium chloride solution.
| September 2, 2021 | education
Given:
m (NaCl) = 10 g
ω (NaCl) = 10%
Find:
m (H2O) -?
Solution:
1) Calculate the mass of the sodium chloride solution:
m solution (NaCl) = m (NaCl) * 100% / ω (NaCl) = 10 * 100% / 10 = 100 g;
2) Calculate the mass of water for preparing a sodium chloride solution:
m (H2O) = m solution (NaCl) – m (NaCl) = 100 – 10 = 90 g.
Answer: The mass of H2O is 90 g.
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