Basic Knowledge

Question 1

Acid + Base–>??

Answer 1

Acid + Base–>Salt + Water

Question 2

Acid + Carbonate–>??

Answer 2

Acid + Carbonate–> Salt + Water+ Carbon Dioxide

Question 3

Acid + Metal–>??

Answer 3

Acid + Metal–> Salt + Hydrogen(gas)

Question 4

Acid + Sulphide–>??

Answer 4

Acid + Sulphide–> Salt + Hydrogen Sulphide (gas)

Question 5

Acid + Sulphite–>??

Answer 5

Acid + Sulphite–> Salt + Water + Sulphur Dioxide(gas)

Question 6

Base + Ammonium Salt–>??

Answer 6

Base + Ammonium Salt–> Salt + Water + Ammonia (gas)

Question 7

Transition metals have a charge of _____ unless told otherwise. Except _____, ____ and ______ which have a charge of __

Answer 7

Transition metals have a charge of 2+ unless told otherwise. Except gold, silver and mercury which have a charge of +1

Question 8

Properties of GasesHydrogen:Oxygen:Hydrogen Sulphide:Ammonia:Sulfur Dioxide:Nitrogen Dioxide:

Answer 8

Properties of GasesHydrogen: C/L and O/LOxygen:C/L and O/LHydrogen Sulphide: C/L and PungentAmmonia: C/L and PungentSulfur Dioxide: C/L and PungentNitrogen Dioxide: Brown and Pungent

Question 9

Tests for gasesOxygen:Carbon Dioxide:Hydrogen:

Answer 9

Tests for gasesOxygen: Glowing splint will re-lightCarbon Dioxide: Limewater will turn milkyHydrogen: ‘pop’ test. A lit splint will cause a pop sound

Question 10

Signs that a chemical change has occurred are..

Answer 10

Colour ChangeSolid appears/disappearsGas produced