2 f) Acids, Bases and Salt Preparation

Question 1

Acid

Answer 1

Source of hydrogen ions (H+) or proton donor.

Question 2

Base

Answer 2

Neutralises acids by combining with the hydrogen ions in them. Soluble base is called an alkali, source of hydroxide ions (OH-) or proton acceptor.

Question 3

Salt

Answer 3

A compound formed when a hydrogen is replaced by a metal or ammonium in an acid.

Question 4

Crystallisation

Answer 4

A process in which a solute (soluble solid) is obtained from its solvent.

Question 5

Filtrate

Answer 5

Liquid that comes through the filter paper.

Question 6

Filtration

Answer 6

Process to separate an insoluble solid from a liquid.

Question 7

Indicator

Answer 7

Substance that has different colours depending on the pH.

Question 8

Neutralisation reaction

Answer 8

Reaction in which acids react with bases or alkalis to produce salts.

Question 9

Precipitate

Answer 9

A solid that is formed by a chemical reaction involving liquids or gases.

Question 10

Residue

Answer 10

Solid left on the filter paper during filtration.

Question 11

Titration (TA only)

Answer 11

Used to follow the course of a neutralisation reaction which can be used to find out how much of an acid/alkali reacts with a certain volume of an alkali/acid.

Question 12

Insoluble

Answer 12

A substance which does not dissolve in a particular solvent.