click below
click below
Normal Size Small Size show me how
Acids and bases
Chapter 20 and 22
Question | Answer |
---|---|
to find out if something is an acid or a base use | litumus paper |
blue litmus changes to red in | Acid |
Red litmus changes to blue in | Base |
Both acids and bases can burn you. they are said to be | Corrosive |
pH tells us | how strong and acid or base is |
the pH scale goes from | 1 to 14 |
what is an indicator? | a substance we use to tell us by a colour change whether a solution is an acid or a base |
Acid in vinegar | ethanoic |
acid in lemons | citric |
Neutraalisation occurs when an acid and a base react together to make a | salt and water |
a base which dissolves in water is called | an alkali |
Chemical formula for salt | NaCl |
A titration is a procedure used | to find out how much acid is needed to neutralise a base |
acid always goes into the | burette |
base is measured using a | pipette |
during a titration the base is placed into the | conical flask |
methyl orange indicator changes colour from orange to | Pink |
when doing a titration why is the indicator left out the last time the titration is done | You all ready know how much acid to add so it is not needed |
How is the salt recovered | evaporate the water |
acid found in car batteries | Sulphuric |
a substance with a pH of 4 is an | acid |
sodium hydroxide is commonly called | caustic soda |
the acid found in acid rain is | Carbonic acid |
examples of fossil fuels include | coal turf and wood |
Natural gas is also called | methane |
cars emit a gas called | nitrogen dioxide |
problems caused by acid rain include | killing fish and trees |
to solve the problem of acid rain we can | use a catalytic converter in a car |