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Intermediate 1 Unit 1d Acids & Alkalis
How would you measure the pH of a substance? A pH paper or universal indicator and check the colour
Name a acid used in the lab. Hydrochloric acid, sulphuric acid, nitric acid.
Name an alkali used in the lab. Sodium hydroxide, lime water and ammonia solution
What are the pH values for an acid?. Below 7
What is the pH of a neutral solution? 7
What are the pH values for an alkali? Above 7
What happens to the acidity as the pH of an acid goes down? It becomes more acidic.
What happens to the pH of an acid when diluted with water? pH goes up
What happens to the pH of an alkali when diluted with water? It goes down
What happens to the acidity of an acid when diluted with water? It becomes less acidic
What happens to the alkalinity of an alkali when diluted with water? It becomes less alkaline
Name a common household acid. Vinegar, lemonade, soda water and coke.
Name a common household alkali. Baking soda, oven cleaner, dishwasher powder, bleach and soaps.
What type of chemical reaction takes when an acid is used? Neutralisation
What are the products when sodium hydroxide neutralises hydrochloric acid? Sodium chloride and water
Name the salt produced when potassium hydroxide neutralises sulphuric acid. Potassium sulphate
Name the salt produced when calcium carbonate neutralises nitric acid. Calcium nitrate
What happens to the pH of an acid when it is neutralised? It goes up to 7
What happens to the pH of an alkali when it is neutralised? It goes down to 7
What are the products when a metal carbonate neutralises an acid? Salt, water and carbon dioxide gas
Give an everyday example of neutralisation. Treatment of indigestion, reducing tooth decay, reducing soil acidity
What is produced when an alkali neutralises an acid? Salt and water
Which oxides dissolve in water in the atmosphere to produce acid rain? Carbon dioxide, sulphur dioxide and nitrogen dioxide
How is sulphur dioxide produced? Burning fossil fuels
How is nitrogen dioxide produced in a car engine? Sparking of air in the engine
Give an example of the damaging effect of acid rain? Destroys buildings made from rock, structures made from steel/iron, soils and animal and plant life.
Intermediate 1 Unit 1d
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