Question

Определите массовую долю вещества если в 100 г воды растворили 2. г соли

Answer 1

Масса раствора=масса соли+масса воды=2г+100г=102г
ω=масса соли/масса раствора *100%=2/102 *100%=1.96≈2%

Answer 2

Calculating Mass Fraction of a Substance in a Solution

To determine the mass fraction of a substance in a solution, we can use the formula:

Mass Fraction = (Mass of Substance / Total Mass of Solution) * 100%

Given: - Mass of water = 100 g - Mass of salt = 2 g

Calculation

Using the formula, we can calculate the mass fraction of the salt in the solution:

Mass Fraction = (2 g / 100 g) * 100%

Mass Fraction = 2%

Therefore, the mass fraction of the salt in the solution is 2%.