Solution concentration. Percent concentration
Answers are for parents and teachers.
1
40 g of sugar are dissolved in 360 g of water. Find the percent concentration.
10
2
How many grams of salt are in 450 g of a 14 % solution?
63
3
0.1 mol of CuSO₄ (M = 160 g/mol) is dissolved in 84 g of water. What percent is the solution?
16
4
What mass of solution in grams is needed to make a 7 % solution from 21 g of salt?
300
5
Explain the phrase «a 4 % soda solution»: how many grams of soda and water are in 250 g of it?
Every 100 g of solution has 4 g of soda; 250 g has 10 g of soda and 240 g of water.