bases

Question 1

define base

Answer 1

substance which accepts hydrogen ion in a reaction
can react with acids and neutralise them to produce salts
usually metal oxides copper potassium zinc iron and sodium iron magnesium a,mmonium

Question 2

what is an alkali

Answer 2

soluble base
produce hydroxide ions when dissolves in water
sodium hydroxide potassium hydroxide ammonia gas when dissolved in water

Question 3

properties of bases

Answer 3

bitter
strong bases corrosive
feel slippery to touch
change red litmus paper blue
pH above 7
can conduct electric current and are electrolytes

Question 4

strong alkali

Answer 4

would completely ionise or dissociate in solution
sodium hydroxide
hydroxides of group 1 metals

Question 5

weak alkali

Answer 5

would partially ionise or dissociate when dissolved in water
ammonium hydroxide or aqueous ammonia
calcium hydroxide
magnesium hydroxide

Question 6

show relationship between strong alkalis and electrolytes

Answer 6

strong electrolyte being strong alkali will have stronger ability to conduct electricity and therefore will be strong electrolytes

Question 7

acid + base

Answer 7

salt and water

Question 8

base + ammonium salts

Answer 8

when heated forms another salt and ammonium gas