$\frac{10}{100} \times 100 = 10\%$

$\frac{0.013}{1000} \times 10^6 = 13$ ppm

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 ions.

Question 2

Which of the following is most likely to be soluble in water?

Accepted Answer

An ionic compound such as NaCl.

Question 3

What type of bond is formed when electrons are transferred from one atom to another?

Accepted Answer

Ionic bond

Question 4

Which of the following compounds is covalent?

Accepted Answer

H$_2$O

Question 5

A solution is made by dissolving 10 grams of KCl in 90 grams of water. What is the percent by mass of KCl in the solution?

Accepted Answer

$\frac{10}{100} 	imes 100 = 10\%$

Question 6

Which of the following statements about covalent compounds is TRUE?

Accepted Answer

They are formed by the sharing of electrons between nonmetals.

Question 7

Which element is always listed first in a chemical formula for a compound?

Accepted Answer

The metal

Question 8

A saturated solution is best described as:

Accepted Answer

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

Question 9

Which of the following best explains why ionic compounds conduct electricity when dissolved in water?

Accepted Answer

The ions are free to move and carry charge in solution.

Question 10

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

Accepted Answer

$\frac{0.013}{1000} 	imes 10^6 = 13$ ppm

Question 11

Which of the following is a property of a covalent compound?

Accepted Answer

Low melting point

Question 12

Which of the following best describes a solution with a high concentration?

Accepted Answer

It contains a large amount of solute relative to solvent.

Question 13

Which of the following is NOT a characteristic of ionic compounds?

Accepted Answer

They have low melting points.

Question 14

What happens to the concentration of a solution if more solvent is added?

Accepted Answer

The concentration decreases.

Question 15

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

Accepted Answer

A compound has a fixed composition; a mixture can have variable composition.

Question 16

Which of the following is the correct order from MOST to LEAST amount of matter?

Accepted Answer

Elements, compounds, atoms

Question 17

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

Accepted Answer

Reacting MgCl$_2$ with water to form new substances

Question 18

Which of the following best describes the process of increasing the concentration of a salt and water solution?

Accepted Answer

Add more salt to the solution.

Question 19

Which of the following best explains why sugar (C$_{12}$H$_{22}$O$_{11}$) does not conduct electricity when dissolved in water?

Accepted Answer

Sugar does not form ions in water; it dissolves as neutral molecules.

Question 20

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

Accepted Answer

CaCl$_2$

Ionic vs. Covalent Compounds and Solubility: Study Guide

Study Guide - Practice Questions