What mass of salt should be added to 150 grams of water to get a 25% solution.
| September 21, 2021 | education
Given:
m (substance) 1 = x g
m (H2O) = 150 g
W = 25%
Find:
m (substances) 2 =?
Solution:
1) Let’s write a formula for solving the problem.
W = (m substance: m solution) x 100%
m solution = x + 150 g.
25% = (x: (150 + x)) x 100%
3750 + 25x = 100x
75x = 3750
x = 50 g.
Answer: m (substance) 2 = 50 g.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
