CHEMISTRY ( acids, bases and salts)

Cards (105)

  • According to the provided table, which substance is the strongest acid?
    Battery fluid
  • According to the provided table, which substance is an alkali?
    Drain cleaner
  • What is the correct chemical formula for sodium hydroxide?
    NaOH
  • What chemical compound does drain cleaner contain?
    Sodium hydroxide
  • In the reaction between a metal and an acid, what products are formed?
    Salt and hydrogen
  • In naming salts formed from metal and acid reactions, which comes first?
    The name of the metal
  • When hydrochloric acid reacts with a metal, what is the second part of the salt's name?
    Chloride
  • When nitric acid reacts with a metal, what is the second part of the salt's name?
    Nitrate
  • When sulphuric acid reacts with a metal, what is the second part of the salt's name?
    Sulphate
  • What products are formed when copper reacts with sulphuric acid?
    Copper sulphate and hydrogen
  • What products are formed when sodium reacts with nitric acid?
    Sodium nitrate and hydrogen
  • What products are formed when potassium reacts with sulphuric acid?
    Potassium sulphate and hydrogen
  • What products are formed when calcium reacts with hydrochloric acid?
    Calcium chloride and hydrogen
  • What products are formed when aluminium reacts with nitric acid?
    Aluminium nitrate and hydrogen
  • In the experiment, what was the maximum temperature rise for metal A?
    57 °C
  • What term describes a reaction that gives out heat?
    Exothermic
  • When metals react with acids, what do they form?
    Salt and hydrogen gas
  • What is the test for identifying hydrogen gas?
    Lit splint in gas
  • What observation is expected for a positive hydrogen gas test?
    Squeaky pop
  • What are bases usually composed of?
    Oxides or hydroxides of metals
  • What are bases called if they are soluble in water?
    Alkalis
  • What ending do most bases have in their names?
    Oxide
  • What ending do alkalis have in their names?
    Hydroxide
  • What is produced when an acid reacts with an alkali?
    Salt and water
  • What type of reaction occurs when an acid reacts with a base?
    Neutralisation
  • What ions from the acid react with ions from the alkali to form water?
    H+ and OH-
  • What is formed from the reaction of H+ ions and OH- ions?
    Water (H₂O)
  • In the experiment to prepare crystals of soluble salts, why is excess base added?
    To ensure all acid has reacted
  • In the experiment to prepare crystals of soluble salts, what does it mean if the salt is soluble?
    It dissolves
  • How can copper sulphate be separated from the other product in the experiment?
    Evaporate
  • What observation is expected in Stage 2 when copper(II) carbonate powder reacts with sulfuric acid?
    Bubbles being made
  • What products are formed in the reaction between an acid and a metal carbonate?
    Salt, water, and carbon dioxide
  • What happens to limewater when carbon dioxide is bubbled through it?
    Turns cloudy
  • What steps are involved in the titration method used to prepare crystals of soluble salts from the reaction of acids with alkalis?
    • Indicator and fixed volume of acid/alkali in flask
    • Exact volume of alkali/acid needed for neutralisation is measured and recorded
    • Same fixed volume of acid/alkali in clean flask and exact volume of alkali/acid needed for neutralisation is added but with no indicator
    • Evaporation of water to form crystals
  • In the titration of a strong acid against a strong base, what is produced when sodium hydroxide is neutralised with hydrochloric acid?
    Sodium chloride in solution
  • During titration, what indicates that neutralisation has occurred?
    Indicator changes colour
  • What piece of equipment is used to accurately measure variable volumes of liquids during a titration?
    Burette
  • During titration, why should you run acid out into a waste beaker before recording the starting volume?
    To fill the burette below the tap
  • During titration, how should the flask be manipulated after each addition of acid?
    Swirled
  • What conclusion can be made if 25cm³ of NaOH requires 30cm³ of HCl to neutralise it?
    HCl has a higher concentration