c3.3

Question 1

redox reaction

Answer 1

reduction and oxidation occurs at same time

Question 2

acid

Answer 2

substance that releases h+ ions when it dissolves in water to make aqueous solution
hydrogen ions make solution acidic

Question 3

base

Answer 3

usually metal oxide or hydroxide that can neutralise acids
if a base can dissolve in water it is also an alkali
alkali releases OH+ ions when dissolves in water
hydroxide ions make solution alkaline

Question 4

neutralisation

Answer 4

acid + base -> salt + water

Question 5

carbonates

Answer 5

acid + carbonate -> salt + water + co2

Question 6

metal

Answer 6

acid + metal -> salt + hydrogen

Question 7

dilute acid

Answer 7

low ratio of acid to volume of solution
less solute

Question 8

concentrated acid

Answer 8

high ratio of acid to volume of solution
more solute

Question 9

weak acids

Answer 9

partially ionised (only small fraction of molecules release h+ ions)

Question 10

strong acids

Answer 10

fully ionised (all molecules release h+ ions)