Determine the mass fraction of sodium carbonate in a solution of soda Na2Co3 weighing 50 g in 750 cm3 of water.
| March 28, 2021 | education
The weight of the solution will be the sum of the weight of the salt and the weight of the water.
The density of the water is 1 gram / ml. Therefore, the weight of the water will be 750 x 1 = 750 grams.
The weight of the solution will be equal to:
M solution = m salt + m water = 50 + 750 = 800 grams;
The weight fraction of salt will be equal to the ratio of the weight of the salt to the weight of the solution.
With salt = m salt / m solution = 50/800 = 0.0625 = 6.25%
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