Question

Вычислить массу соли которая необходима для приготовления 150 грамм раствора с массовой долей соли 3%

Answer 1

W=m(соли) / m(р-ра) *100%

m(соли)=W*m(р-ра)= 0.03*150 = 4.5 (г)

Answer 2

Calculation of the Mass of Salt Needed

To calculate the mass of salt needed to prepare a 150-gram solution with a salt concentration of 3%, we can use the formula:

Mass of Salt = Mass of Solution x Salt Concentration

Given: - Mass of Solution = 150 grams - Salt Concentration = 3%

Substituting the values into the formula, we get:

Mass of Salt = 150 grams x 3%

To calculate this, we need to convert the percentage to a decimal by dividing it by 100:

Mass of Salt = 150 grams x 0.03

Now we can calculate the mass of salt:

Mass of Salt = 4.5 grams

Therefore, to prepare a 150-gram solution with a salt concentration of 3%, you would need 4.5 grams of salt.