chemistry 🧪

To increase the concentration of the dissolved substance in the solution, use it ... must.

• dilution

• evaporation

• sedimentation

35 %- mass of the substance dissolved in 100 g of solution

• 3,5 g

• 17,5g

• 35 g

A common solvent in nature:

• water

• salt

• oxygen

In 170 g of water, 30 g of substance B was dissolved. Mass fraction of the substance in solution

• 12%

• 15%

• 5%

Mass fraction of calcium hydroxide formed with the addition of a mass of 200 g of calcium to 1 liter of water

• 3.11%

• 3%

• 31,1%