Determine the mass of potassium hydroxide in a 0.5 liter solution with a mass fraction of potassium hydroxide of 10%

univerkov | January 15, 2021 | education

Determine the mass of potassium hydroxide in a 0.5 liter solution with a mass fraction of potassium hydroxide of 10%. The density of the solution is 1.092 g / cm ^ 3.

Find the mass of potassium hydroxide in the solution.
W = m (substance): m (solution) × 100%,
hence m (substance) = (m (solution) × w): 100%.
We find the mass of the solution by the formula: m = V p.
m = 0.5 l × 1.092 g / cm3 = 0.546 g.
m (KOH) = (0.546 g × 10%): 100% = 0.0546 g.
Answer: 0.0546 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.