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Chemical reactions: acid and metal

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Lesson outcome

Waxaan qeexi karaa waxa dhacaya marka aashito ay la falceliso bir waxaana u qori karaa isla'egyo erayo iyo calaamado ah oo falcelintan.

Introduction

In this lesson: I can describe what happens when an acid reacts with a metal and write word and symbol equations for these reactions. 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.

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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.

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Quizzes

  1. 1. Which of the following describes what universal indicator is?

    • Correct answer:Paper that turns different colours depending on the pH of the solution.
    • Correct answer: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.

  2. 2. Where are metals found in the periodic table?

    • Correct answer:on the left hand side
    • on the right hand side
    • at the bottom
    • at the top
    • all over

  3. 3. Which types of atom are found in nitric acid (HNO₃)?

    • Correct answer:hydrogen
    • chlorine
    • Correct answer:nitrogen
    • Correct answer:oxygen

  4. 4. Which types of atom are found in sulfuric acid (H₂SO₄)?

    • Correct answer:sulfur
    • Correct answer:hydrogen
    • Correct answer:oxygen
    • sulfur dioxide

  1. 1. 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.
    • Correct answer:Place a lit splint into the gas and see if it makes a squeaky pop sound.

  2. 2. Most metals corrode when they react with an acid. What does the word 'corrode' mean in this context?

    • Correct answer: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.

  3. 3. Which of the following salts is produced when hydrochloric acid reacts with zinc?

    • zinc hydride
    • zinc chlorine
    • Correct answer:zinc chloride
    • zinc chloric
    • zinc hydroxide

  4. 4. A pupil wrote the following sentence: "When a metal reacts, it forms salt and a gas." Choose a more accurate sentence from the list.

    • Correct answer: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.

  5. 5. Which is the correct symbol equation for the reaction between zinc and sulfuric acid?

    • Zn + HNO₃ → ZnSO₄ + H₂
    • Correct answer:Zn + H₂SO₄ → ZnSO₄ + H₂
    • ZN + H₂SO₄ → ZNSO₄ + H₂
    • Zn + H₂SO₄ → ZnCl₂ + H₂

What pupils see

The same lesson as a pupil sees it. You can set any section as work on its own.

  • IntroductionPrepare
  • Starter quizActivate · 4 questions
  • Lesson videoLearn
  • Exit quizCheck · 5 questions
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