In medicine, a physiological solution is used – a 0.85% solution of sodium chloride NaCl. Calculate the mass of table salt and the mass of water required to obtain 100 g of such a solution.
The mass of the solution is 100 grams;
To find the mass of salt, it is necessary to multiply its mass fraction by the mass of the solution.
m salt = 100 x 0.85 / 100 = 0.85 grams;
To find the mass of water, subtract the mass of salt from the mass of the solution:
m water = 100 – 0.85 = 99.15 grams;
Check: 99.15 + 0.85 = 100;
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