Balancing Chemical Reactions and Products

Balancing Chemical Reactions and Products

Assessment

Interactive Video

Chemistry, Science

8th - 10th Grade

Medium

Created by

Emma Peterson

Used 4+ times

FREE Resource

Dr. B explains how to balance the chemical equation Na + H2O yields NaOH + H2. The process involves counting the atoms on each side, adjusting coefficients to achieve balance, and ensuring even numbers for easier balancing. The video concludes with an explanation of the reaction's explosive nature due to hydrogen gas ignition.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the initial chemical equation discussed in the video?

Na + H2O yields NaOH + H2

Na + O2 yields Na2O

H2 + O2 yields H2O

NaOH + H2 yields Na + H2O

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

One

Three

Four

Two

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step suggested to balance the equation?

Add a coefficient of 2 in front of NaOH

Add a coefficient of 2 in front of Na

Add a coefficient of 3 in front of H2O

Add a coefficient of 3 in front of NaOH

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

After adjusting the coefficients, how many total hydrogen atoms are there?

Five

Three

Four

Two

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the final step to balance the oxygen atoms?

Add a coefficient of 3 in front of H2O

Add a coefficient of 3 in front of NaOH

Add a coefficient of 2 in front of Na

Add a coefficient of 2 in front of H2O

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the trick mentioned for balancing equations with odd numbers?

Remove products

Add more reactants

Convert odd numbers to even numbers

Use a catalyst

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens when hydrogen gas is ignited in the reaction?

It becomes sodium

It turns into oxygen

It creates a spark

It forms water

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