Balancing Chemical Equations with Polyatomic Ions

Balancing Chemical Equations with Polyatomic Ions

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Mia Campbell

FREE Resource

The video tutorial explains how to balance a chemical equation involving copper(II) nitrate and potassium hydroxide. It introduces the concept of double displacement reactions and demonstrates a strategy for balancing equations using polyatomic ions as single units. The tutorial provides a step-by-step guide to balancing the equation, emphasizing the importance of counting polyatomic ions as one item to simplify the process. The video concludes with a balanced equation and tips to avoid errors.

Read more

9 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of reaction occurs when copper(II) nitrate reacts with potassium hydroxide?

Decomposition reaction

Synthesis reaction

Single displacement reaction

Double displacement reaction

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it helpful to treat polyatomic ions as single units when balancing chemical equations?

It simplifies the balancing process.

It makes the equation more complex.

It changes the chemical properties of the ions.

It increases the number of steps required.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the reaction, how many nitrate ions are present on the reactant side before balancing?

One

Two

Three

Four

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What coefficient is placed in front of potassium nitrate to balance the nitrates in the equation?

3

4

2

1

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many hydroxide ions are present on the product side before balancing?

Four

Three

Two

One

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the final coefficient for potassium hydroxide to balance the hydroxides in the equation?

2

1

3

4

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

After balancing, how many potassium atoms are present on each side of the equation?

Three

Two

Four

One

8.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a key tip for balancing equations with polyatomic ions?

Ignore the polyatomic ions.

Change their chemical formula.

Count them as individual atoms.

Treat them as single units.

9.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Who is the narrator of the video tutorial?

Dr. D

Dr. B

Dr. C

Dr. A