Question 1

Which term best describes the smallest possible neutral unit of an ionic compound, as illustrated in the image above?

Accepted Answer

Formula unit

Question 2

Given the ions $$\mathrm{Mg$$^{2+}$$}$$ and $$\mathrm{PO_4$^{3-}}$$, what is the correct formula for the resulting ionic compound?

Accepted Answer

$$\mathrm{Mg_3$(PO_4$)_2}$$

Question 3

How many ions are present in one formula unit of $$\mathrm{Ba(NO_3$)_2}$$?

Accepted Answer

4

Question 4

What is the correct name for the compound $$\mathrm{Fe_2O_3}$$?

Accepted Answer

Iron(III) oxide

Question 5

Which of the following is the correct formula for lithium oxide?

Accepted Answer

$$\mathrm{Li_2O}$$

Question 6

What is the correct name for $$\mathrm{(NH_4$)_2SO_4}$$?

Accepted Answer

Ammonium sulfate

Question 7

Which of the following compounds contains both a polyatomic cation and a polyatomic anion?

Accepted Answer

$$\mathrm{(NH_4$)_2SO_4}$$

Question 8

What is the correct formula for potassium dihydrogen phosphate?

Accepted Answer

$$\mathrm{KH_2PO_4}$$

Question 9

Which of the following best describes what happens when an acid is dissolved in water?

Accepted Answer

It forms $$\mathrm{H_3O^+}$$ ions.

Question 10

A solution of $$\mathrm{NaOH} is $$prepared in water. Which ion is responsible for the basicity of the solution?

Accepted Answer

$$\mathrm{OH^-}$$

Question 11

Which of the following is the correct formula for silver nitrate?

Accepted Answer

$$\mathrm{$$AgNO_3$$}$$

Question 12

What is the correct name for $$\mathrm{Cs_2HPO_4}$$?

Accepted Answer

Cesium hydrogen phosphate

Question 13

Which of the following best explains why ionic compounds are electrically neutral overall?

Accepted Answer

The total positive charge equals the total negative charge in the formula unit.

Question 14

What is the correct formula for iron(II) sulfide?

Accepted Answer

$$\mathrm{FeS}$$

Question 15

How many ions are present in one formula unit of $$\mathrm{Li_3PO_4}$$?

Accepted Answer

4

Question 16

Which of the following is the correct name for $$\mathrm{Cu_2O}$$?

Accepted Answer

Copper(I) oxide

Question 17

Which of the following best describes the process by which ammonia ($$\mathrm{NH_3$}) $$acts as a base in water?

Accepted Answer

It reacts with water to form $$\mathrm{OH^-}$$ ions.

Ionic Compounds: Writing Formulas, Formula Units, and Naming

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