Question 1 (1 point)
Which of the following is not a way to describe the concentration of a solution?

Question 1 options:

solubility

molarity

mass percent

Question 2 (2 points)
If 18g of salt was dissolved in a 100g solution, what is the percent concentration?

Question 2 options:

18%

0.18%

82%

Question 3 (2 points)
45g of sugar was dissolved in 30g of water. What is the percent sugar in the solution? HINT: Percent means the amount of how much you have out of the total.

Question 3 options:

60%

40%

75%

Question 1. Solubility

Question 2. 18%

Question 3. 60%

Explanation:

Question 1.

Molarity and mass percent are both, sort of concentrations for solutions.

They involve the amount of solute respect to the solution.

Solubility is the ability of a substance to dissolve in another. This capacity can be expressed in moles per liter.

Question 2.

Percent concentration which is also the same as mass percent, shows the mass of solute in 100 g of solution.

In this case, for 18 g of salt which are contained in 100 g of solution, the percent concentration is 18%

Question 3.

Solute: 45 g of sugar

Solvent: 30 g of water

Solution: 75 g of solution

Percent sugar in the solution → (45 g / 75g) . 100 = 60%

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