How much water do you need to take to prepare 120 g of a 15% saline solution?
July 27, 2021 | education|
1. Find the mass of salt required to prepare 120g of 15% salt solution. To do this, we will compose and solve the proportion:
120 g – 100%;
Xg – 15%.
X = (120 * 15): 100 = 18 (g).
2. Find the mass of water, for this we subtract the mass of salt from the total mass of the solution:
120 – 18 = 102 (g).
Answer: 102 g of water is needed to prepare the solution
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