12. All of the following describes a solution EXCEPT:

A. clear
B. homogeneous
C. can be separated by physical means D. light can pass through This is a required question


13. A solution is prepared by mixing 20 g of sodium chloride in 80 g of water. What are the concentrations of the solute and solvent in % by mass?

A. Solute: 10% Solvent 90%
B. Solute: 20% Solvent 80%
C. Solute: 30% Solvent 70%
D. Solute: 40% Solvent 60%


14. A beverage contains 3% alcohol which means that

A. The solution contains 3 ml of alcohol in 97 ml of water
B. The solution contains 30 ml of water in 70 ml of water
C. The solution contains 300 ml of water in 700 ml of water
D. The solution contains 100 ml of water in 100 ml of water


15-16. What is the percentage concentration in the following solution: 2g sucrose in 80 grams water?

A. 2.4%
B. 4.4%
C. 0.025%
D. 2.5%​