Acid Reactions & Salts · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.
به انگلیسی

Acids, salts, and neutralisation

Science · Matter & Materials · ages 12-13
Name ______________________   Date ____________

  1. In a teacher-supervised laboratory, which observation identifies a small collected sample of hydrogen?

    • A glowing splint relights when held at the test tube's mouth
    • A lighted splint gives a squeaky pop at the tube's mouth
    • Limewater turns cloudy when the gas is bubbled through it

  2. Magnesium reacts with dilute hydrochloric acid and bubbles form. Which gas does this reaction produce?

    Hydrochloric acid+ magnesium→Magnesium chloride+ ?
    • Oxygen
    • Hydrogen
    • Carbon dioxide

  3. An acid reacting with an alkali is an example of neutralisation.

    Circle one:   True   False

  4. Hydrochloric acid reacts with copper(II) oxide, a basic metal oxide. Which products form?

    • Copper(II) chloride and water
    • Copper(II) chloride and hydrogen
    • Copper(II) sulfate and carbon dioxide

  5. Hydrochloric acid neutralises sodium hydroxide solution. Which salt is produced?

    • Sodium sulfate
    • Sodium nitrate
    • Sodium chloride

  6. Which use of a material reduces soil acidity by neutralisation?

    • Adding sand to change the soil's texture
    • Adding agricultural lime containing calcium carbonate
    • Adding extra water to keep the soil wet during dry weather

  7. Potassium hydroxide solution is neutralised with an acid. The salt produced is potassium nitrate. Which acid was used?

    • Nitric acid
    • Hydrochloric acid
    • Sulfuric acid

  8. A student writes 'acid + basic metal oxide → salt + hydrogen'. Which change repairs the products?

    Acid+ basic oxide→Salt+ hydrogen
    • Replace hydrogen with oxygen gas
    • Keep hydrogen and add carbon dioxide
    • Replace hydrogen with water
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Answer key

For grown-ups. Fold this page away before handing over the rest.

Acids, salts, and neutralisation W1-mt_QKRYLwaOU8-s1

  1. A lighted splint gives a squeaky pop at the tube's mouth · A small hydrogen sample gives a squeaky pop with a lighted splint. Use eye protection and the teacher's method.
  2. Hydrogen · Magnesium reacts with dilute hydrochloric acid to produce magnesium chloride and hydrogen.
  3. True · An alkali is a soluble base. Its reaction with an acid is neutralisation and produces salt and water.
  4. Copper(II) chloride and water · A basic metal oxide reacts with hydrochloric acid to make a metal chloride and water. Here the metal is copper.
  5. Sodium chloride · The base supplies sodium. Hydrochloric acid gives chloride salts. Combining these names gives sodium chloride.
  6. Adding agricultural lime containing calcium carbonate · Calcium carbonate is a base. It reacts with acid to produce salt, water and carbon dioxide, reducing soil acidity.
  7. Nitric acid · Nitrate identifies nitric acid in these reactions. Potassium comes from potassium hydroxide.
  8. Replace hydrogen with water · An acid reacting with a basic metal oxide produces salt and water. Hydrogen does not belong in this product pattern.
Worksheet · LightMySky