Indicators are used to determine whether a solution is acidic or alkaline. Acids react with metals, bases and carbonates to produce salts. Neutralisation is the reaction between an acid and a base.
Name the products of the reaction between zinc and hydrochloric acid.
Zinc chloride and hydrogen
Zinc hydrochloride and water
Zinc chloride and water
What is the formula of sodium sulfate?
Which pair of substances do not react together to make copper sulfate?
Copper and sulfuric acid
Copper carbonate and sulfuric acid
Copper oxide and sulfuric acid
In the preparation of zinc chloride crystals from zinc carbonate and hydrochloric acid, why is the mixture filtered after the zinc carbonate has been added to the acid?
To allow large crystals to form
To remove excess zinc carbonate
To remove excess zinc chloride
What is the formula of the ion produced by acids in aqueous solution?
In the preparation of a salt, why is the saturated solution of the salt left in a warm, dry place for a few days rather than heated over a water bath?
To speed up the evaporation of the water
To remove impurities
Which of these pH values is the pH of an acidic solution?
Which of these substances is a weak acid?- Higher
What is the best definition of a weak acid?- Higher
An acid which is only partially ionised in aqueous solution
An acid with a pH between 5.0 and 6.9
A dilute solution of an acid
A acid of concentration 1 mol/dm3 has a pH of 2.0. The acid is diluted to a concentration of 0.1 mol/dm3. What is its new pH? - Higher