Question

Для засолки огурцов требуется раствор с массовой долей поваренной соли 2% рассчитайте какую массу соли и воды Необходимо взять для приготовления 3 кг такого раствора

Answer 1

3 кг=3000 гр
3000*0,2= 600 гр
20%= 0,2

Answer 2

Calculating Salt and Water Needed for Brining Cucumbers

To calculate the mass of salt and water needed to prepare a 2% salt solution for brining 3 kg of cucumbers, we can use the formula for calculating the mass of a solution:

Mass of solute = (mass fraction of solute) × (total mass of solution)

Mass of solvent = Total mass of solution - Mass of solute

Given: - Mass fraction of salt (solute) = 2% - Total mass of solution = 3 kg

Using the formula, we can calculate the mass of salt and water needed.

1. Calculating the Mass of Salt: - Mass of solute (salt) = (mass fraction of salt) × (total mass of solution) - Mass of solute (salt) = 2% of 3 kg - Mass of solute (salt) = 0.02 × 3000 g - Mass of solute (salt) = 60 g

2. Calculating the Mass of Water: - Mass of solvent (water) = Total mass of solution - Mass of solute (salt) - Mass of solvent (water) = 3000 g - 60 g - Mass of solvent (water) = 2940 g

Therefore, to prepare a 2% salt solution for brining 3 kg of cucumbers, you would need 60 grams of salt and 2940 grams of water.