Chemical Reactions and Ionic Compounds

Chemical Reactions and Ionic Compounds

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Aiden Montgomery

FREE Resource

The video tutorial explains how to write and balance the chemical equation for potassium sulfate (K2SO4) dissolving in water (H2O). It begins by identifying K2SO4 as an ionic compound composed of potassium (K) and sulfate (SO4) ions. The video details the charges of these ions, with potassium having a +1 charge and sulfate a -2 charge. When K2SO4 is dissolved in water, it separates into its ions, requiring the equation to be balanced by adding coefficients. The tutorial concludes by explaining the use of 'aq' to denote aqueous solutions, indicating the ions are dissolved in water.

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8 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of compound is formed when a metal combines with nonmetals?

Organic compound

Ionic compound

Metallic compound

Covalent compound

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the charge of a potassium ion (K) in the periodic table?

0

+2

+1

-1

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you determine the charge of the sulfate ion (SO4)?

By looking at the periodic table

By observing its color

By using a table of polyatomic ions

By measuring its pH

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to K2SO4 when it is placed in water?

It evaporates

It forms a precipitate

It remains unchanged

It dissolves into ions

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is a coefficient of 2 placed in front of K+ in the balanced equation?

To balance the charge

To balance the number of potassium ions

To indicate a solid state

To show a reaction with water

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does 'aq' signify when written after an ion in a chemical equation?

The ion is in a liquid state

The ion is dissolved in water

The ion is in a solid state

The ion is in a gaseous state

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is liquid water (H2O) not written on the product side of the equation?

Because it forms a new compound

Because 'aq' already indicates the presence of water

Because it evaporates

Because it is not involved in the reaction

8.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the final equation for the reaction of K2SO4 with water?

K2SO4 + H2O → K2SO4(aq)

K2SO4 + H2O → K2SO4 + H2O

K2SO4 + H2O → 2K+ + SO4^2-

K2SO4 + H2O → K2O + H2SO4