# Balancing equations using moles (HT only)

This lesson, students will write chemical formulae using knowledge of ion charges and balance equations using the same number of atoms rule. Students will also balance equations using moles.

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.What is a mole?

1/9

Q2.Which equation would you use to calculate mass?

2/9

Q3.Calculate the mass of 1.5 moles of MgSO₄. Relative atomic mass of Mg = 24; S = 32; O 16

3/9

Q4.Convert 0.72 kg into grams.

4/9

Q5.Convert 648 mg into grams.

5/9

Q6.Calculate the number of moles in 6.6 kg of NaCl. Relative atomic mass Na = 23; Cl = 35.5

6/9

Q7.How many atoms or molecules in a mole?

7/9

Q8.Calculate the number of atoms in 46 g of Na. (Hint - calculate the number of moles first). Relative atomic mass Na = 23.

8/9

Q9.Calculate the number of atoms in 5 moles H₂O.

9/9

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.What is a mole?

1/9

Q2.Which equation would you use to calculate mass?

2/9

Q3.Calculate the mass of 1.5 moles of MgSO₄. Relative atomic mass of Mg = 24; S = 32; O 16

3/9

Q4.Convert 0.72 kg into grams.

4/9

Q5.Convert 648 mg into grams.

5/9

Q6.Calculate the number of moles in 6.6 kg of NaCl. Relative atomic mass Na = 23; Cl = 35.5

6/9

Q7.How many atoms or molecules in a mole?

7/9

Q8.Calculate the number of atoms in 46 g of Na. (Hint - calculate the number of moles first). Relative atomic mass Na = 23.

8/9

Q9.Calculate the number of atoms in 5 moles H₂O.

9/9

# Video

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# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

Quiz:

# Balancing equations

This quiz will test your knowledge from this lesson

Q1.What is the formula of sodium chloride? Sodium ion= Na⁺ and Chloride ion = Cl⁻

1/5

Q2.Which of the following equations is balanced?

2/5

Q3.Which of the following equations is balanced?

3/5

Q4.Which number is missing to balance the equation : MgO + ___HCl → MgCl₂ + H₂O

4/5

Q5.Which number is missing to balance the equation : CH₃OH + O₂ → CO₂ + ___H₂O

5/5

Quiz:

# Balancing equations

This quiz will test your knowledge from this lesson

Q1.What is the formula of sodium chloride? Sodium ion= Na⁺ and Chloride ion = Cl⁻

1/5

Q2.Which of the following equations is balanced?

2/5

Q3.Which of the following equations is balanced?

3/5

Q4.Which number is missing to balance the equation : MgO + ___HCl → MgCl₂ + H₂O

4/5

Q5.Which number is missing to balance the equation : CH₃OH + O₂ → CO₂ + ___H₂O

5/5

# Lesson summary: Balancing equations using moles (HT only)

## Time to move!

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