Acids Flashcards
What pH is most acidic and what colour is it
0 and red
What happens when you react an acid and a base
Salt and water
It is a neutralisation reaction
What are salts used for
Make fertilisers - ammonium nitrate and phosphate
Colouring agents in fireworks - calcium chloride for orange and copper chloride for blue
What acid is produced in the stomach and what does it do
Hydrochloride acid which kills bacteria
What is indigestion and how is it controlled
To much hydrochloric acid so tablets containing bases like calcium carbonate neutralise some
What happens when you react an acid with a base (oxides or hydroxides)
Salt and water
Displacement reaction:
Hydrochloric acid + copper oxide -> copper chloride + water
What is the symbol for sulfuric acid
H2SO4
Symbol for nitric acid
HNO3
What happens when you react an acid with a metal carbonate
Salt + water+ carbon dioxide
Symbol for sodium carbonate
Na2CO3
What is electrolysis
Breaking down of a compound using electrical energy
What is required for electrolysis
An electrolyte containing a compound going to be split
Two electrodes
What happens when you electrolyse hydrochloric acid
Hydrogen gas and chlorine gas
What is the test for chlorine
Bleaches damp litmus paper
What does electrolysis of sea water (brine or sodium chloride solution) make
Chlorine used to treat water supplies, make bleach and make PVC
