Topic 9 - Reactions Of Acids

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  • 1/11 Questions

    What is a neutraliser?

    • A substance that can neutralise an acid only
    • A substance that can neutralise an alkali only
    • A substance that can neutralise an acid or an alkali
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About This Quiz

Explore the reactions of acids in 'Topic 9 - Reactions of Acids'. This quiz assesses understanding of neutralisation, salt formation, and pH changes. Key topics include reactions with sodium carbonate, magnesium oxide, and the effect of lime on soil. Essential for learners in advanced chemistry courses.

Acid Base Reactions Quizzes & Trivia

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  • 2. 

    Name the salt produced when sodium carbonate reacts with sulphuric acid.

    • Sodium carbide

    • Carbon sulphide

    • Sodium sulphate

    • Sodium sulphide

    Correct Answer
    A. Sodium sulphate
    Explanation
    acid + metal carbonate --> salt + water + CO2
    Suphuric acid produce salts with the ending sulphate.

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  • 3. 

    Complete the following equation: Magnesium oxide + hydrochloric acid -->

    • Magnesium chloride + hydrogen

    • Magnesium chloride + water

    • Magnesium chloride + water + CO2

    Correct Answer
    A. Magnesium chloride + water
    Explanation
    metal oxide + acid --> salt + water

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  • 4. 

    A salt is a substance in which the ___________ ion of the acid has been replaced by a metal (or ammonium) ion.

    Correct Answer
    hydrogen
    H+
    Hydrogen
    H2
    Explanation
    A salt is formed when the hydrogen ion (H+) of an acid is replaced by a metal or ammonium ion. This replacement results in the formation of a new compound known as a salt. The options "hydrogen," "H+," "Hydrogen," and "H2" all refer to the hydrogen ion present in the acid. Therefore, any of these options can be used to complete the given statement correctly.

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  • 5. 

    When lime is added to acidic soil, the pH will get lower.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    If the soil is pH 4, when lime is added, the soil pH will increase towards pH 7 as the alkaline lime neutralises the acidity in the soil.

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  • 6. 

    Name the gas produced when magnsium reacts with nitric acid

    • Hydrogen

    • Carbon dioxide

    • Nitrogen

    • Oxygen

    Correct Answer
    A. Hydrogen
    Explanation
    (Reactive) metal + acid --> salt + H2

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  • 7. 

    How many moles of HCl acid will be used if the volume is 20 cm3 and the concentration is 0.1 mol/l.

    • 0.02

    • 0.002

    • 2

    • 0.0002

    Correct Answer
    A. 0.002
    Explanation
    n = c x v where v must be in litres, 0.1 x 20/1000 = 0.002 moles of acid

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  • 8. 

    What is the average volume of acid used during the following titration.Rough titre - 25.2 cm31st titre     -  22.3 cm32nd titre    -  22.1 cm3

    • 22.2

    • 23.2

    • 44.4

    • 69.6

    Correct Answer
    A. 22.2
    Explanation
    Ignore the rough titre - average of 1st and 2nd (22.3 + 22.1 = 44.4 / 2 = 22.2)

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  • 9. 

    What would be the concentration of magnesium hydroxide solution if 25 cm3 was needed to neutalise the HCl acid (conc 0.1, vol 20 cm3 ).Hint:  You will need to write a balanced equation

    • 0.4 mol/l

    • 0.04 mol/l

    • 0.08 mol/l

    • 0.1 mol/l

    Correct Answer
    A. 0.04 mol/l
    Explanation
    Mg(OH)2 + 2HCl --> MgCl2 + 2H2O
    2 moles HCl --> 1 mole Mg(OH)2
    0.002 moles HCl -> 0.001 moles Mg(OH)2
    c = n/v = 0.001/(25/1000) = 0.04 mol/l

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  • 10. 

    Name the type of reaction when sodium carbonate solution is added to copper (II) sulphate solution.  (You may wish to use page 5 of the data booklet).

    • Neutralisation

    • Addition

    • Precipitation

    • Oxidation

    Correct Answer
    A. Precipitation
    Explanation
    Na2CO3(aq) + CuSO4(aq) --> CuCO3(s) + Na2SO4(aq)

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  • 11. 

    Which box or boxes are examples of neutralisation.

    • Adding lime to acidic soil

    • Using toothpaste to neutralise mouth alkalinity

    • Using lemon juice to neutralise bee stings

    • Using lemon juice to neutralise wasp stings.

    Correct Answer(s)
    A. Adding lime to acidic soil
    A. Using lemon juice to neutralise wasp stings.
    Explanation
    lime (calcium hydroxide - not the fruit) is an alkali, so will neutralise acidic soil. Lemon juice is acidic so will only neutralise alkaline wasp stings, (bee stings as they are acidic). The pH of the mouth is acidic not alkaline.

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  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 06, 2010
    Quiz Created by
    Lslater
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