Q: If 15 grams of a solute are dissolved in 85 grams of water, what is the percent by mass of the solute in the solution?

$$\frac{15}{15+85} \times 100 = 15\%$$

Question 1

Which of the following best describes an ionic compound?

Accepted Answer

A compound consisting of a metal and a nonmetal that is made up of charged particles called ions

Question 2

Which of the following is a property of covalent compounds?

Accepted Answer

They generally have low melting and boiling points

Question 3

Which of the following best explains why table salt (NaCl) conducts electricity when dissolved in water?

Accepted Answer

The ions in NaCl separate and move freely in solution, allowing electric current to flow

Question 4

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

Accepted Answer

Compounds, elements, atoms

Question 5

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

Accepted Answer

Unsaturated

Question 6

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 7

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

Accepted Answer

NaCl

Question 8

When sugar is dissolved in water, which of the following statements is true?

Accepted Answer

Sugar is the solute and water is the solvent

Question 9

Which of the following best describes the type of bond formed in H$$_2O$$?

Accepted Answer

Covalent bond

Question 10

Which of the following statements about ionic and covalent bonds is correct?

Accepted Answer

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons

Question 11

A student adds more solute to a saturated solution and observes that the solute does not dissolve. What is the best explanation for this observation?

Accepted Answer

The solution has reached its maximum solubility at that temperature

Question 12

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 13

Which of the following is a correct chemical formula for an ionic compound?

Accepted Answer

NaCl

Question 14

If 15 grams of a solute are dissolved in 85 grams of water, what is the percent by mass of the solute in the solution?

Accepted Answer

$$\frac{15}{15+85} 	imes 100 = 15\%$$

Question 15

Which of the following best describes a mixture?

Accepted Answer

A combination of two or more substances that are not chemically bonded

Question 16

Which of the following is a real-life example of a covalent compound?

Accepted Answer

Glucose (C$$_6H$_{12}O$_6)$$

Question 17

Which of the following statements about solubility is correct?

Accepted Answer

The solubility of most solids increases as temperature increases

Question 18

Which of the following best describes the difference between an atom and an element?

Accepted Answer

An atom is a single particle of matter, while an element is a substance made up of only one type of atom

Question 19

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

Accepted Answer

Strong electrostatic forces between oppositely charged ions require a lot of energy to break

Question 20

Which of the following is the correct formula for calculating percent by mass of a solute in a solution?

Accepted Answer

$$	ext{Percent by mass} = \frac{	ext{mass of solute}}{	ext{mass of solution}} 	imes 100$$

Ionic vs. Covalent Compounds and Solubility: Study Guide

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