Acids, Bases And Salts Flashcards
Name four indicators:
Phenolphthalein
Methyl orange
Red litmus
Blue litmus
Universal
What colour is phenolphthalein indicator in alkaline solution?
Pink
What does a colour green mean on a universal indicator?
The solution is neutral
Why is carbonate a weak acid?
It partially ionises in water
Why is sodium hydroxide a strong alkali?
It completely ionises in water
What is an alkali?
An soluble base
State the neutralisation reaction:
Acid + alkali = water
What type of reaction is neutralisation?
Exothermic
Metal + acid =
Salt + hydrogen
What is a base?
A substance that reacts with acid to produce a salt and water
Metal carbonate + acid =
Salt + water + carbon dioxide
Metal hydrogencarbonate + acid =
Salt + water + carbon dioxide
Ammonia + acid =
Ammonium salt
How can you test for hydrogen gas?
Using a lot splint
Due to the experiment how do you know if hydrogen is present?
There will be a popping sound
What is a salt?
A compound formed when some or all of the hydrogen ions in an acid are replaced by metal or ammonium ions
Name three acids which form salts:
Hydrochloride acid
Sulphuric acid
Nitric acid
Ethanoic acid
What colour are iron salts and what colour of solution do they form?
Green salt
Green solution
What happens to zinc when it dissolves in water?
It forms a colourless solution
