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Acids and bases

Science. junior cert

QuestionAnswer
What turns blue litmus paper red? An acid
What turns red litmus paper blue? A base
Bases that are soluble are called ? Alkali
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
What do you call the scale that goes from 0 to 14 and measures the strength of an acid or base? A pH scale
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
2 Strong corrosive acids are? Hydrochloric acid and sulphuric acid
2 Strong Corrosive bases are? Sodium hydroxide and Potassium hydroxide
What kind of taste does an acid have Sharp and sour
Sodium hydroxide is more commonly known as what? Caustic soda
Examples of quite harmless acids are what? Citric acid (oranges), Carbonic acid (fizzy drinks)
What kind of feel do all bases, dissolved in water have? Soapy
A salt is formed when a metal ion replaces what in an acid? Hydrogen
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
Acids and alkalis react together to form what two things.? Salt and water
Acids and carbonates react together to form what three things? Salt, water and carbon dioxide
When carrying out a titration what should you always put in the burette on top? Acid
Why would you add litmus indicator to the alkali during a titration? To see a colour change
The chemical formula for sodium hydroxide is what? NaOH
The chemical formula for hydrochloric acid is what? HCl
The chemical formula for sodium chloride is what? NaCl
The chemical formula for calcium carbonate (marble chips) is what? CaCO3
What do you call the instrument used to accurately measure the alkali in an experiment? Pipette
How would you prove that salt and water has been formed after a titration experiment Evaporate the water.
Created by: gcu science
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