Science. junior cert
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What turns blue litmus paper red? | An acid
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| What turns red litmus paper blue? | A base
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| Bases that are soluble are called ? | Alkali
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| What do you call a chemical that shows, by means of a colour change, whether a substance is an acid or a base ? | An indicator
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| What do you call the scale that goes from 0 to 14 and measures the strength of an acid or base? | A pH scale
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| Paper that is used to measure the pH of a substance. Neutral is 7. Less than 7 is an acid. Higher than 7 is a base | Universal indicator paper
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| 2 Strong corrosive acids are? | Hydrochloric acid and sulphuric acid
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| 2 Strong Corrosive bases are? | Sodium hydroxide and Potassium hydroxide
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| What kind of taste does an acid have | Sharp and sour
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| Sodium hydroxide is more commonly known as what? | Caustic soda
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| Examples of quite harmless acids are what? | Citric acid (oranges), Carbonic acid (fizzy drinks)
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| What kind of feel do all bases, dissolved in water have? | Soapy
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| A salt is formed when a metal ion replaces what in an acid? | Hydrogen
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| What do you call an experiment used to find out exactly how much hydrochloric acid is needed to neutralise a certain amount of sodium hydroxide? | Titration
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| Acids and alkalis react together to form what two things.? | Salt and water
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| Acids and carbonates react together to form what three things? | Salt, water and carbon dioxide
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| When carrying out a titration what should you always put in the burette on top? | Acid
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| Why would you add litmus indicator to the alkali during a titration? | To see a colour change
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| The chemical formula for sodium hydroxide is what? | NaOH
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| The chemical formula for hydrochloric acid is what? | HCl
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| The chemical formula for sodium chloride is what? | NaCl
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| The chemical formula for calcium carbonate (marble chips) is what? | CaCO3
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| What do you call the instrument used to accurately measure the alkali in an experiment? | Pipette
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| How would you prove that salt and water has been formed after a titration experiment | Evaporate the water.
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