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Yr 11 Chem 1.2

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  • Which base did we react with the acid?
    Sodium carbonate.
  • What is neutralisation?
    A reaction between an acid and a base.
  • Are antacids acids or bases?
    Bases.
  • What is a base?
    A substance with a pH greater than 7.
  • Why is fizzing evidence of a chemical reaction?
    A gas is being produced.
  • What are reactants?
    The starting substances in a reaction.
  • What does a colour change tell us when using an indicator?
    A chemical change/reaction may be occurring.
  • Which acid did we use in our neutralisation experiment?
    Hydrochloric acid.
  • Why does mass stay the same during neutralisation?
    Atoms are rearranged, not created or destroyed.
  • Complete: Acid + Base → ______ + ______
    Salt + water
  • What are products?
    The new substances formed in a reaction.
  • What acid is found in the stomach?
    Hydrochloric acid.
  • Name the products of: Hydrochloric acid + Sodium carbonate -->
    Sodium chloride, water and carbon dioxide.
  • What type of reaction occurs when an antacid reacts with stomach acid?
    Neutralisation
  • What colour is universal indicator at pH 7?
    Green
  • What does a balanced equation show?
    The same number of atoms on both sides.
  • What is an acid?
    A substance with a pH less than 7, has Hydrogen ions
  • What gas was produced?
    Carbon dioxide
  • What colour is universal indicator in a strong acid?
    Red
  • What does conservation of mass mean?
    Mass stays the same during a reaction.
  • What happens to atoms during a reaction?
    They are rearranged
  • What was the name of the indicator we used in our lab experiment?
    Universal Indicator
  • How does our laboratory experiment model what happens in the stomach?
    An acid reacts with a base and becomes less acidic.
  • Why is understanding neutralisation important for antacid users?
    It explains how antacids reduce stomach acidity and relieve discomfort.
  • How does an antacid help someone with heartburn?
    It neutralises excess stomach acid and reduces acidity.
  • What happens to red litmus paper in a base?
    Turns blue
  • What evidence showed a reaction occurred?
    Fizzing/bubbling.
  • Why do people take antacids?
    To relieve heartburn/indigestion
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