Balancing Chemical Equations Concepts

Balancing Chemical Equations Concepts

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Emma Peterson

FREE Resource

The video tutorial explains how to balance the chemical equation involving potassium superoxide (KO2) and water (H2O). The instructor guides through counting atoms on each side, adjusting hydrogen and oxygen atoms, and finally balancing the equation. The process involves making hydrogen an even number to simplify balancing, followed by adjustments to oxygen and potassium atoms. The tutorial concludes with a balanced equation and a brief recap.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the chemical formula for potassium superoxide?

K2O2

KOH

K2O

KO2

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in balancing a chemical equation?

Count the atoms on each side

Add more reactants

Change the chemical formula

Remove products

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many hydrogen atoms are initially present on the product side?

4

3

2

1

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What adjustment is made to balance the hydrogen atoms?

Remove oxygen atoms

Add more water

Double the hydrogen atoms

Add potassium atoms

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

After balancing hydrogen, how many hydrogen atoms are there on each side?

3

5

2

4

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the next step after balancing hydrogen atoms?

Add more reactants

Change the chemical formula

Remove potassium atoms

Balance oxygen atoms

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many oxygen atoms are there on the reactant side after balancing?

7

4

5

6

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