Acids, Bases and Salts

Gap-fill exercise

  
Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Some substances whose odour changes in acidic or basic media. These are called indicators.

The reaction between an acid and a base to give a salt and water is known as a reaction.

Bases which are soluble in water are called .

Acidic nature of a substance is due to the formation of in solution.

Formation of OH–(aq) ions in solution is responsible for the of a substance.

When an acid reacts with a metal, hydrogen gas is evolved and a corresponding is formed.

The strength of an acid or an alkali can be tested by using a scale called the .

A neutral solution has a pH of .

An acidic solution has a pH .

A basic solution has a pH .

Mixing concentrated acids or bases with water is a process.

Salt formed by the combination of and .

When electricity is passed through an aqueous solution of sodium chloride (called brine), it decomposes to form sodium hydroxide. The process is called the process.

is produced by the action of chlorine on dry slaked lime .

Recrystallisation of sodium carbonate gives .

is used for making toys, materials for decoration and for making surfaces smooth.

is used for removing permanent hardness of water.

is used for disinfecting drinking water to make it free of germs.