Chemical reactions: acid and metal | Science | Quizalize & Oak National Academy

Starter quiz

Match the following key terms to the correct description.
- pestle and mortar
  
  ⇔
  
  Tools used to crush and grind substances. ✓
- pH scale
  
  ⇔
  
  A scale from 1 - 14 which measures acidity or alkalinity of solutions. ✓
- acid
  
  ⇔
  
  A solution with a pH of less than 7. ✓
- base
  
  ⇔
  
  A substance which reacts with an acid to form a salt and water. ✓
- solution
  
  ⇔
  
  This forms when a substance dissolves in a liquid. ✓
- alkali
  
  ⇔
  
  A soluble substance with a pH greater than 7. ✓
Which of the following describes what universal indicator is?
- Paper that turns different colours depending on the pH of the solution. ✓
- A solution that turns different colours depending on the pH of the solution. ✓
- Paper that turns red or blue to indicate if a solution is acid or alkaline.
- A solution that turns cloudy when carbon dioxide is present.
Where are metals found in the periodic table?
- on the left hand side ✓
- on the right hand side
- at the bottom
- at the top
- all over
Match the chemical symbols to the correct metal.
- zinc
  
  ⇔
  
  Zn ✓
- magnesium
  
  ⇔
  
  Mg ✓
- copper
  
  ⇔
  
  Cu ✓
- calcium
  
  ⇔
  
  Ca ✓
- lead
  
  ⇔
  
  Pb ✓
- iron
  
  ⇔
  
  Fe ✓
Which types of atom are found in nitric acid (HNO₃)?
- hydrogen ✓
- chlorine
- nitrogen ✓
- oxygen ✓
Which types of atom are found in sulfuric acid (H₂SO₄)?
- sulfur ✓
- hydrogen ✓
- oxygen ✓
- sulfur dioxide

Exit quiz

A pupil wants to test the gas that was released when zinc reacted with sulfuric acid. Which of the following tests would show that this gas was hydrogen?
- Place a glowing splint into the gas and see if it relights.
- Bubble the gas through limewater solution and see if it turns cloudy.
- Place a lit splint into the gas and see if it makes a squeaky pop sound. ✓
Most metals corrode when they react with an acid. What does the word 'corrode' mean in this context?
- The metal will reduce in size when it reacts with an acid. ✓
- The metal will increase in size when it reacts with an acid.
- The acid will eat away at the metal.
- The metal will dissolve into the acid.
Complete the word equation for the following reaction: magnesium + hydrochloric acid → ______ + hydrogen.
- 'magnesium chloride' ✓
Which of the following salts is produced when hydrochloric acid reacts with zinc?
- zinc hydride
- zinc chlorine
- zinc chloride ✓
- zinc chloric
- zinc hydroxide
A pupil wrote the following sentence: "When a metal reacts, it forms salt and a gas." Choose a more accurate sentence from the list.
- When a metal reacts with an acid, it forms a metal salt and hydrogen. ✓
- When a metal reacts, it forms bubbles and salt.
- When a metal reacts with an acid, it forms a non–metal.
- When a metal reacts with an acid, it forms hydrogen gas.
Which is the correct symbol equation for the reaction between zinc and sulfuric acid?
- Zn + HNO₃ → ZnSO₄ + H₂
- Zn + H₂SO₄ → ZnSO₄ + H₂ ✓
- ZN + H₂SO₄ → ZNSO₄ + H₂
- Zn + H₂SO₄ → ZnCl₂ + H₂

Worksheet

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Lesson Details

Key learning points

When a metal reacts with acid bubbles may form, it is exothermic and the metal reduces in size (disappears).
Different metals have varying reactivity with acids.
When a metal reacts with an acid, the products are a metal salt and hydrogen gas.
The word equation for a metal and acid reaction is: metal + acid → metal salt + hydrogen.
The test for hydrogen gas is to introduce a lit splint, which will make a squeaky pop in hydrogen.

Common misconception

Pupils can expect that all reactions will be vigorous and they will see lots of bubbles being formed instantly.

Get pupils to leave and observe their metal + acid reactions over a period of time, e.g. 5 minutes. This will ensure that they will be able to observe bubbles forming more slowly for metals such as iron or zinc.

Keywords

Effervescence - when bubbles of gas are produced in a liquid; another way of saying a liquid is fizzing
Corrosion - when a metal reduces in size due to a chemical reaction
Chemical test - when a chemical reaction is carried out to determine the presence of a substance
Acid - a solution that has a pH of less than 7
Metal salt - a compound comprising of a metal and a non-metal