There are two salt solutions weighing 150 g and 120 g. The first and second solutions contain 18 g
| May 31, 2021 | education
There are two salt solutions weighing 150 g and 120 g. The first and second solutions contain 18 g of salt each. What is the concentration of these solutions?
To find out the concentration of salt in these solutions, you need to divide the indicated weight of salt by the weight of the entire solution and multiply by 100%.
Thus, we get:
18/150 * 100% = 1800/150 = 12% (in 1 solution).
18/120 * 100% = 1800/120 = 15% (in solution 2).
If you mix these solutions, then their total mass will be:
150 + 120 = 270 grams.
The weight of the salt in them will be equal to:
18 * 2 = 36 grams.
The salt concentration in the resulting solution will be:
36/270 * 100% = 3600/270 = 13 1/3%.
Answer: 12% and 15%.
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