Reacting masses and yield (GCSE Chemistry)

This lesson, students will use a balanced equation to work out the quantity of reacting elements needed to produce a specified product and predict the mass of a product from a specified starting mass. Yield is also covered.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

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!

Question 1

Question 2

Question 3

Question 4

Question 5

Q1.What type of reaction happens when a compound breaks down due to heating?

1/5

Q2.Iron oxide + aluminium → iron + aluminium oxide. If there is 160 g of iron oxide, 54 g of aluminium and 112 g of aluminium oxide, what is the mass of iron produced?

2/5

Q3.H₂ (g) + Cl₂ (g) → 2HCl (g). Starting with 2 g of hydrogen, what mass of hydrogen chloride would be produced? (Relative atomic masses: H = 1; Cl = 35.5)

3/5

Q4.What mass of magnesium oxide is formed when 12g of magnesium reacts with oxygen? 2Mg + O₂ → 2MgO

4/5

Q5.What mass of aluminium oxide is produced when 13.5g of aluminium is burned in oxygen? 2Al + 3O₂ → Al₂O₃

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

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!

Question 1

Question 2

Question 3

Question 4

Question 5

Q1.What type of reaction happens when a compound breaks down due to heating?

1/5

Q2.Iron oxide + aluminium → iron + aluminium oxide. If there is 160 g of iron oxide, 54 g of aluminium and 112 g of aluminium oxide, what is the mass of iron produced?

2/5

Q3.H₂ (g) + Cl₂ (g) → 2HCl (g). Starting with 2 g of hydrogen, what mass of hydrogen chloride would be produced? (Relative atomic masses: H = 1; Cl = 35.5)

3/5

Q4.What mass of magnesium oxide is formed when 12g of magnesium reacts with oxygen? 2Mg + O₂ → 2MgO

4/5

Q5.What mass of aluminium oxide is produced when 13.5g of aluminium is burned in oxygen? 2Al + 3O₂ → Al₂O₃

5/5

Video

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Worksheet

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Reacting masses and yield (Triple)

This quiz will test your knowledge from this lesson and previous lessons.

Question 1

Question 2

Question 3

Question 4

Question 5

Q1.What is the theoretical yield of a product?

1/5

Q2.H₂ (g) + Cl₂ (g) → 2HCl (g). Starting with 2 g of hydrogen, what mass of hydrogen chloride would be produced? (Relative atomic masses: H = 1; Cl = 35.5)

2/5

Q3.What mass of magnesium oxide is formed when 12 g of magnesium reacts with oxygen? 2Mg + O₂ → 2MgO

3/5

Q4.What mass of aluminium oxide is produced when 13.5 g of aluminium is burned in oxygen? 2Al + 3O₂ → Al₂O₃

4/5

Q5.Which of these is NOT a reason why the percentage yield is less than 100%?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Reacting masses and yield (Triple)

This quiz will test your knowledge from this lesson and previous lessons.

Question 1

Question 2

Question 3

Question 4

Question 5

Q1.What is the theoretical yield of a product?

1/5

Q2.H₂ (g) + Cl₂ (g) → 2HCl (g). Starting with 2 g of hydrogen, what mass of hydrogen chloride would be produced? (Relative atomic masses: H = 1; Cl = 35.5)

2/5

Q3.What mass of magnesium oxide is formed when 12 g of magnesium reacts with oxygen? 2Mg + O₂ → 2MgO

3/5

Q4.What mass of aluminium oxide is produced when 13.5 g of aluminium is burned in oxygen? 2Al + 3O₂ → Al₂O₃

4/5

Q5.Which of these is NOT a reason why the percentage yield is less than 100%?

5/5

Lesson summary: Reacting masses and yield (GCSE Chemistry)

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