Question 1

Which of the following best describes an ionic compound?

Accepted Answer

A compound consisting of a metal and a nonmetal, held together by electrostatic attraction between oppositely charged ions.

Question 2

Given the elements sodium (Na) and chlorine (Cl), which of the following is the correct systematic formula for the compound they form?

Accepted Answer

$$\mathrm{NaCl}$$

Question 3

Which of the following is NOT a characteristic of a chemical reaction?

Accepted Answer

Change in physical state without altering chemical composition.

Question 4

Which of the following is the correct balanced chemical equation for the reaction of hydrogen gas with oxygen gas to form water?

Accepted Answer

$$\mathrm{2H_2 + O_2$ \rightarrow 2H_2O}$$

Question 5

A student dissolves table salt ($$\mathrm{NaCl}) in $$water. Which of the following best describes the resulting solution?

Accepted Answer

A solution where $$\mathrm{Na^+}$$ and $$\mathrm{Cl^-}$$ ions are uniformly distributed in water.

Question 6

Which of the following is the correct systematic name for $$\mathrm{Fe_2O_3}$$?

Accepted Answer

Iron(III) oxide

Question 7

Which of the following best explains why ionic compounds tend to have high melting points?

Accepted Answer

They are held together by strong electrostatic forces between oppositely charged ions.

Question 8

Which of the following is a correct net ionic equation for the reaction between aqueous solutions of silver nitrate ($$\mathrm{$$AgNO_3$$}) $$and sodium chloride ($$\mathrm{NaCl}$$)?

Accepted Answer

$$\mathrm{Ag^+ (aq) + Cl^- (aq) \rightarrow AgCl (s)}$$

Question 9

A solution is prepared by dissolving 10 g of glucose ($$\mathrm{C_6H_{12}O_6$}) in 90 g of $$water. Which of the following statements is correct?

Accepted Answer

Water is the solvent and glucose is the solute.

Question 10

Which of the following best describes a hydrate?

Accepted Answer

A compound that contains water molecules chemically bound within its crystal structure.

Question 11

Which of the following is the correct systematic formula for a compound formed from aluminum and sulfate ions?

Accepted Answer

$$\mathrm{Al_2$(SO_4$)_3}$$

Question 12

Which of the following is a strong acid?

Accepted Answer

Hydrochloric acid ($$\mathrm{HCl})$$

Question 13

Which of the following best describes the process of dissolution for an ionic compound in water?

Accepted Answer

The ionic compound dissociates into its constituent ions, which are stabilized by interactions with water molecules.

Question 14

Which of the following is the correct balanced molecular equation for the reaction of aqueous hydrochloric acid ($$\mathrm{HCl}) $$with aqueous sodium hydroxide ($$\mathrm{NaOH}$$)?

Accepted Answer

$$\mathrm{HCl (aq) + NaOH (aq) \rightarrow NaCl (aq) + H_2O (l)}$$

Question 15

A student is asked to predict whether a precipitate will form when solutions of $$\mathrm{$$BaCl_2$$}$$ and $$\mathrm{Na_2SO_4}$$ are mixed. Which of the following is correct?

Accepted Answer

$$\mathrm{$$BaSO_4$$}$$ will precipitate because it is insoluble in water.

Question 16

Which of the following is an example of a chemical change?

Accepted Answer

Rusting of iron.

Question 17

Which of the following best describes a polar molecular compound?

Accepted Answer

A compound with an uneven distribution of electron density, resulting in partial positive and negative charges.

Question 18

Which of the following is the correct systematic name for $$\mathrm{CO_2$}$$?

Accepted Answer

Carbon dioxide

Question 19

Which of the following is a correct example of a collision theory requirement for a chemical reaction to occur?

Accepted Answer

Reactant particles must collide with sufficient energy and proper orientation.

Question 20

A solution is prepared by dissolving 5 g of potassium nitrate ($$\mathrm{$$KNO_3$$}) in 100 g of $$water at 20°C. If the solubility of $$\mathrm{$$KNO_3$$} at 20$$°C is 32 g per 100 g water, what type of solution is formed?

Accepted Answer

An unsaturated solution

Introduction to Chemistry: Study Guide for Examination 2

Guida di studio - Domande di pratica

Study guide - Flashcard