Chapter 4 - Acids and Redox

Question 1

What do all acids contain in their formulae?

Answer 1

They all contain at least a hydrogen atom. - H+

Question 2

What do all alkali contain?

Answer 2

They contain at least a hydroxide ion. - OH-

Question 3

State the general neutralisation reaction.

Answer 3

Acid + alkali -> salt + water

Question 4

What is a strong acid?

Answer 4

Is a compound where it fully/completely dissociates to release H+ ions in an aqueous solution.

Question 5

What is a weak acid?

Answer 5

Is a compound where it partially dissociates to release H+ ions in an aqueous solution.

Question 6

State the general ionic equation of a neutralisation reaction.

Answer 6

H+(aq) + OH-(aq) -> H2O(l)

Question 7

State some common bases - metal oxides.

Answer 7

MgO - Magnesium oxide.
CaO - Calcium oxide.
CuO - Copper oxide.

Question 8

States some common bases - metal carbonates.

Answer 8

Na2CO3 - Sodium carbonate.
CaCO3 - Calcium carbonate.
CuCO3 - Copper carbonate.

Question 9

What are some common alkalis?

Answer 9

NaOH - Sodium hydroxide.
KOH - Potassium hydroxide.
NH3 - Ammonia.

Question 10

Give the names of some common acids.

Answer 10

Hydrochloric acid - HCl and it forms a chloride salt.
Sulfuric acid - H2SO4 and it forms a sulfate salt.
Nitric acid - HNO3 and it forms a nitrate salt.
Ethanoic acid (vinegar) - CH3COOH and it forms a ethanoate salt.

Question 11

Give some common salts and their name.

Answer 11

Sodium chloride - NaCl.
Sodium sulfate - Na2SO4.
Calcium nitrate - Ca(NO3)2.
Ammonium ethanoate - CH3COONH4.