Question 1

Which of the following best describes an ionic compound?

Accepted Answer

A compound formed by the transfer of electrons from a metal to a nonmetal, resulting in oppositely charged ions

Question 2

Which of the following is most likely to be a covalent compound?

Accepted Answer

CO$$_2$$

Question 3

When NaCl dissolves in water, which statement is true?

Accepted Answer

Na$$^+$$ and Cl$$^-$$ ions are formed and dispersed throughout the solution

Question 4

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

Accepted Answer

They are composed of ions held together by strong electrostatic forces

Question 5

A solution is made by dissolving 10 grams of KNO$$_3 in 100 $$grams of water at 40$$^	ext{o}C. $$According to the solubility graph, is this solution saturated, unsaturated, or supersaturated?

Accepted Answer

Unsaturated

Question 6

Which of the following best describes a solvent?

Accepted Answer

The substance present in the greatest amount in a solution

Question 7

Which of the following compounds is most likely to conduct electricity when dissolved in water?

Accepted Answer

NaCl

Question 8

A student adds more solute to a saturated solution at constant temperature. What will happen?

Accepted Answer

The excess solute will remain undissolved at the bottom

Question 9

Which of the following best describes the process of dissociation in an ionic compound?

Accepted Answer

Ions in the solid lattice are separated and surrounded by water molecules

Question 10

Which of the following is the correct formula for calcium chloride?

Accepted Answer

CaCl$$_2$$

Question 11

A solution contains 5 grams of NaCl dissolved in 95 grams of water. What is the percent by mass of NaCl in the solution?

Accepted Answer

$$5\%$$

Question 12

Which of the following statements about covalent compounds is true?

Accepted Answer

They generally have low melting and boiling points

Question 13

Which of the following best explains why sugar (C$$_6H$_{12}O$_6) $$does not conduct electricity when dissolved in water?

Accepted Answer

Sugar molecules do not form ions in solution

Question 14

Which of the following is a property of a solution?

Accepted Answer

It is a homogeneous mixture

Question 15

If 0.013 grams of manganese are found in 1000 grams of water, what is the concentration of manganese in ppm?

Accepted Answer

$$13\ 	ext{ppb}$$

Question 16

Which of the following best describes a saturated solution?

Accepted Answer

A solution in which no more solute can dissolve at a given temperature

Question 17

Which of the following would increase the concentration of a salt in a water solution?

Accepted Answer

Evaporating some of the water from the solution

Question 18

Which of the following is the correct order from most to least complex: elements, atoms, compounds?

Accepted Answer

Compounds, elements, atoms

Question 19

Which of the following best describes the difference between a compound and a mixture?

Accepted Answer

A compound has a fixed composition and chemical bonds, a mixture does not

Question 20

Which of the following is the correct name for MgBr$$_2$$?

Accepted Answer

Magnesium bromide

Ionic vs. Covalent Compounds and Solubility: Study Guide

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