Question 1

Which of the following statements best explains why sodium chloride (NaCl) dissolves readily in water?

Accepted Answer

The partial negative charge on oxygen in water attracts Na+ ions, while the partial positive charge on hydrogen attracts Cl- ions.

Question 2

A solution is prepared by mixing 60.0 mL of ethanol and 30.0 mL of methanol. Which is the solute and which is the solvent?

Accepted Answer

Ethanol is the solvent; methanol is the solute.

Question 3

Which of the following pairs will NOT form a solution?

Accepted Answer

Nonpolar solute and polar solvent

Question 4

Which statement correctly describes the difference between a solution, a colloid, and a suspension?

Accepted Answer

Solutions contain small particles that do not settle, colloids contain larger particles that do not settle, and suspensions contain very large particles that settle out.

Question 5

Which of the following best describes the interaction between methanol and water in forming a solution?

Accepted Answer

Methanol and water interact through hydrogen bonding due to their polar nature.

Question 6

Which of the following mixtures would be classified as a colloid?

Accepted Answer

Milk

Question 7

A student mixes gasoline (nonpolar) with water (polar). What will happen?

Accepted Answer

Gasoline will not dissolve in water because 'like dissolves like' and they have different polarities.

Question 8

Which of the following is a correct statement about suspensions?

Accepted Answer

Suspensions contain very large particles that settle out and can be separated by filtration.

Question 9

Which of the following best describes the process of osmosis in red blood cells placed in a hypotonic solution?

Accepted Answer

Water moves into the cell, causing it to swell and possibly burst.

Question 10

Which of the following is true about the solubility of ionic compounds in water?

Accepted Answer

Ionic compounds dissolve in water due to the attraction between water's partial charges and the ions.

Question 11

Which of the following is a correct example of a solution?

Accepted Answer

Salt dissolved in water

Question 12

Which statement best explains why octane (nonpolar) does not dissolve in water (polar)?

Accepted Answer

Octane is nonpolar and water is polar, so their intermolecular forces are not compatible.

Question 13

Which of the following statements about colloids is correct?

Accepted Answer

Colloids contain larger particles than solutions but do not settle out.

Question 14

Which of the following is the best example of a suspension?

Accepted Answer

Muddy water

Question 15

Which of the following best describes the 'like dissolves like' principle?

Accepted Answer

Polar substances dissolve in polar solvents, and nonpolar substances dissolve in nonpolar solvents.

Question 16

Which of the following is NOT a characteristic of a solution?

Accepted Answer

Particles can be separated by filtration.

Question 17

When potassium iodide (KI) is added to water, what type of mixture is formed?

Accepted Answer

Solution

Question 18

Which of the following best explains why hydrogen bromide (HBr) will dissolve in water?

Accepted Answer

There is a large difference in electronegativity between hydrogen and bromine, causing the bond to be polar.

Question 19

Which of the following statements about the separation of mixtures is correct?

Accepted Answer

Colloids can be separated by semipermeable membranes but not by filters.

Question 20

Which of the following best describes the interaction between lithium chloride and water?

Accepted Answer

The positive lithium ions interact with the partially negative oxygen atoms in water, and the negative chloride ions interact with the partially positive hydrogen atoms.

Solutions: Definitions, Properties, and Types of Mixtures

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