How many grams of sodium chloride and water are required to prepare 10 liters

| August 1, 2021 | education

How many grams of sodium chloride and water are required to prepare 10 liters of cucumber pickling solution, in which the mass fraction of sodium chloride is 3%?

1. Calculate the mass of the solution by the formula: V = m ρ, ρ (H2O) = 1 g / cm3

Let’s convert liters to grams. 10 l = 10000 g = 10kg.

V = 10000 g × 1 g / cm3 = 10000g = 10 kg.

2.Calculate the mass of sodium chloride in solution, if it is known that its mass fraction is 3%, according to the formula:

w = m (substance): m (solution) × 100%.

m (substance) = (w × m (solution)): 100%.

m (NaCl) = (3% × 10 kg): 100% = 0.3 kg.

3. Calculate the mass of water that you need to take to prepare a 3% solution:

m (H2O) = m (solution) – m (substance),

m (H2O) = 10 kg – 0.3 kg = 9.7 kg.

Answer: m (NaCl) = 0.3kg; m (H2O) = 9.7 kg.



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