Solutions - Multiple Choice Review - Part A - Mixtures, Solubility, and Concentration

Sep 30, 2026

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A multiple-choice review focused on AP Chemistry topics including mixtures, solubility, and concentration. Part A evaluates whether mixtures follow the law of definite composition, identifies mixture types using particle size, settling behavior, homogeneity, and the Tyndall effect, and tests correct separation methods for solutions. It also covers suspension properties, polarity and “like dissolves like,” solvent compatibility for ionic solids and organics, immiscibility with carbon tetrachloride, and relative solubility in benzene, water, and hexane. Additional questions address temperature effects on solubility, saturation/unsaturation concepts, and factors affecting dissolved CO2, KCl solubility, and KNO3 recrystallization using given solubility values.

LanguageEnglish

CategoryExam

FormatPDF

Pages13

Reading Time33 min

AccessFree to download

Mixtures, Solubility, and Concentration

Mixture types and identification

Separations and solubility rules

Saturation, temperature effects, and concentration

Solutions: Multiple Choice Review PSI AP Chemistry Name Part A: Mixtures, Solubility, and Concentration 1. Which of the following would be FALSE regarding mixtures? (A) Mixtures do not obey the law of definite composition. (B) Mixtures are composed of only two pure substances. (C) Mixtures can be separated by physical methods. (D)Solutions, suspensions, and colloids are all considered mixtures. (E) None of these are false. 2. Identify the type of mixture of substances X, Y and Z based on the following data. | | Substance X | Substance Y | Substance Z | | --- | --- | --- | --- | | Particle size | 0.5nm | 2000nm | 500nm | | Settling of particles | No | Yes | No | | Homogenous | Yes | No | Yes | | Tyndall Effect | No | Yes | Yes | (A) X = suspension, Y= colloid, Z = solution (B) X = colloid, Y = solutions, Z = suspension (C) X = solution, Y = suspension, Z = colloid (D)X = colloid, Y = suspension, Z = solution 3. Which of the following physical methods is often employed to separate a solution? I. Distillation II. Filtration III. Evaporation (A) I only (B) II only (C) III only (D)I and II only (E) I and III only 4. Which of the following is FALSE regarding a suspension? (A) Suspensions have larger particles than solutions. (B) Solutions cannot be separated by filtration. (C) A sample of a suspension will not be uniform in composition. (D)Suspensions have smaller particles than colloids. (E) Solutions demonstrate the Tyndall effect. 5. A mixture of crystals of salt and sugar is added to water and stirred until all solids have dissolved. Which statement best describes the resulting mixture? (A) The mixture is homogeneous and can be separated by filtration. (B) The mixture is homogeneous and cannot be separated by filtration. (C) The mixture is heterogeneous and can be separated by filtration. (D)The mixture is heterogeneous and cannot be separated by filtration. 6. The phrase "like dissolves like" refers to the fact that . (A) gases can only dissolve other gases (B) polar solvents dissolve polar solutes and nonpolar solvents dissolve nonpolar solutes (C) solvents can only dissolve solutes of similar molar mass (D)condensed phases can only dissolve other condensed phases (E) polar solvents dissolve nonpolar solutes and vice versa 7. Ionic solids will most likely dissolve in (A) H2O(l), which is a polar solvent (B) H2O(l), which is a nonpolar solvent (C) CCl4 (l), which is a polar solid (D)CCl4 (l), which is a nonpolar solvent 8. Of the following, ____________ should be immiscible with carbon tetrachloride, CCl4. (A) C6H14 (B) Br2 (C) CH3CH2OH (D)C3H8 (E) I2 9. Which one of the following substances is more likely to dissolve in benzene (C6H6)? (A) CH3CH2OH (B) NH3 (C) NaCl (D)CCl4 (E) HBr 10. Which one of the following is most soluble in water? (A) CH3OH (B) CH3CH2CH2OH (C) CH3CH2OH (D)CH3CH2CH2CH2OH (E) CH3CH2CH2CH2CH2OH 11. Which one of the following is most soluble in hexane (C6H14)? (A) CH3OH (B) CH3CH2CH2OH (C) CH3CH2OH (D)CH3CH2CH2CH2OH (E) CH3CH2CH2CH2CH2OH 12. Which of the following substances is more likely to dissolve in water? O (A)CH3 (CH2)9CH (B) HOCH2CH2OH (C) CHCl3 (D)CH3 (CH2)8CH2OH (E) CCl4 13. Which of the following is a water soluble substance whose solubility will increase with increasing temperature? (A) NH3 (g) (B) LiOH(s) (C) CaCO3 (s) (D) CBr4 (l) (E) CO2 (g) 14. Which of the following is a water soluble substance whose solubility will decrease with increasing temperature? (A) NH3 (g) (B) LiOH(s) (C) CaCO3 (s) (D) CBr4 (l) (E) CO2 (g) 15. A solution in a beaker has some un-dissolved solute lying on the bottom of the beaker. If the rate of crystallization is equal to the rate of dissolution of the excess solute, the solution is described as (A) dilute. (B) concentrated. (C) unsaturated. (D)saturated. (E) supersaturated.

FAQs

How can you distinguish a solution, colloid, and suspension?

Use particle size, settling behavior, homogeneity, and the Tyndall effect. Solutions are homogeneous with no Tyndall effect, while colloids can show the Tyndall effect and suspensions are not homogeneous and may settle.

What does the phrase "like dissolves like" mean in solubility?

Polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes. This polarity match explains which substances dissolve more readily.

How do temperature changes affect solubility and saturation?

For substances where solubility increases with temperature, lowering temperature decreases solubility. Saturated solutions contain dissolved solute in equilibrium with undissolved solute, while unsaturated solutions have less than the maximum solubility.

Sep 30, 2026

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