To a solution of sodium chloride weighing 80 g with a mass fraction of salt of 0.1 was added 20 g of the same salt.
| December 9, 2020 | education
To a solution of sodium chloride weighing 80 g with a mass fraction of salt of 0.1 was added 20 g of the same salt. Calculate the mass fraction of salt in the newly formed solution
m (in-va) = m (solution) * w
m (in general) = 80 * 0.1 = 8 g
m (in-va) 2 = 20 + 8 = 28g
m (solution) = 80 + 20 = 100 g
w = m (substance) / m (solution)
w = 28/100 * 100 = 28%
Answer: 28%
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.
