Question 1

Which of the following best describes a solution in chemistry?

Accepted Answer

A homogeneous mixture of two or more substances

Question 2

Which of the following is NOT an example of a solution?

Accepted Answer

Sand mixed with iron filings

Question 3

A solution is prepared by dissolving 10.0 g of NaCl in 250.0 g of water. What is the mass percent of NaCl in the solution?

Accepted Answer

$$3.85\%$$

Question 4

Which of the following compounds is a strong electrolyte when dissolved in water?

Accepted Answer

NaCl

Question 5

What is the molarity of a solution prepared by dissolving 5.85 g of NaCl (molar mass = 58.5 g/mol) in enough water to make 0.500 L of solution?

Accepted Answer

$$0.200\ \mathrm{M}$$

Question 6

Which of the following statements about solubility is correct?

Accepted Answer

A supersaturated solution contains more solute than is present in a saturated solution at a given temperature.

Question 7

How many grams of KCl (molar mass = 74.55 g/mol) are needed to prepare 250.0 mL of a 0.500 M KCl solution?

Accepted Answer

$$9.32\ \mathrm{g}$$

Question 8

A student wants to dilute 50.0 mL of a 6.0 M HCl solution to a final concentration of 1.0 M. What will be the final volume after dilution?

Accepted Answer

$$300.0\ \mathrm{mL}$$

Question 9

Which of the following aqueous solutions would have the highest concentration of Cl$$^-$$ ions?

Accepted Answer

$$0.50\ \mathrm{M}\ \mathrm{CaCl}_2$$

Question 10

A solution contains 15.0 g of NaOH (molar mass = 40.0 g/mol) dissolved in 250.0 mL of solution. What is the molarity of the solution?

Accepted Answer

$$1.50\ \mathrm{M}$$

Question 11

Which of the following best explains why ionic compounds tend to dissolve in water?

Accepted Answer

Water is a polar solvent that stabilizes ions through ion-dipole interactions.

Question 12

What is the final concentration if 100.0 mL of 2.0 M NaCl is diluted to a total volume of 500.0 mL?

Accepted Answer

$$0.40\ \mathrm{M}$$

Question 13

Which of the following is a colligative property of solutions?

Accepted Answer

Boiling point elevation

Question 14

A 0.10 M solution of which of the following compounds will conduct electricity the best?

Accepted Answer

KNO$$_3$$

Question 15

Which of the following best describes a supersaturated solution?

Accepted Answer

A solution that contains more dissolved solute than is normally possible at a given temperature

Question 16

If 25.0 mL of 0.200 M H$$_2SO$_4 is $$required to neutralize 50.0 mL of NaOH solution, what is the concentration of the NaOH solution?

Accepted Answer

$$0.200\ \mathrm{M}$$

Question 17

Which of the following is the best example of a weak electrolyte?

Accepted Answer

CH$$_3$$COOH$

Question 18

A solution is prepared by dissolving 20.0 g of glucose (C$$_6H$_{12}O$_6$$, molar mass = 180.0 g/mol) in enough water to make 500.0 mL of solution. What is the molarity of the solution?

Accepted Answer

$$0.222\ \mathrm{M}$$

Question 19

Which of the following statements is true regarding the effect of temperature on the solubility of solids in liquids?

Accepted Answer

Increasing temperature generally increases the solubility of solids in liquids.

Question 20

Which of the following best describes the role of the solvent in a solution?

Accepted Answer

The solvent is the substance present in the greatest amount and dissolves the solute.

Solutions: Properties, Concentrations, and Calculations (Chapter 13 Study Notes)

Guida di studio - Domande di pratica

Study guide - Flashcard