Acids and alkalis Flashcards
What are common Lab acids?
Hydrochloric acid
Sulfuric acid
Nitric acid
What are common Lab alkalis?
Sodium hydroxide
potassium hydroxide
What pH do alkali solutions give?
greater than pH 7
What pH do acid solutions give?
less than pH 7
What colour does universal indicator turn in the presence of strong acid?
It turns from green to red
What colour does universal indicator turn in the presence of weak acid?
It turns from green to yellow
What colour does universal indicator turn in the presence of weak alkali?
It turns from green to turquoise
What colour does universal indicator turn in the presence of strong alkali?
It turns from green to purple/blue
A solution which is neither acid or alkali it is called
neutral
What colour is a neutral solution using universal indicator?
Green
Acids all contain
hydrogen
Alkalis all contain
hydroxide
acid + alkali –>
Salt + water
metal carbonate + acid –>
salt + water + carbon dioxide
metal oxide + acid –>
salt + water
What is the test for carbon dioxide?
turns limewater
metal hydroxide + acid –>
salt + water
An acid and alkali is an example of a
neutralisation reaction
Lithium hydroxide + nitric acid –>
Lithium nitrate + water
copper carbonate + nitric acid –>
copper nitrate + water + carbon dioxide
copper carbonate + sulfuric acid –>
copper sulfate + water + carbon dioxide
when an acid or alkali undergo neutralisation reactions their pH moves to
7 neutral solution
Everyday uses of acids
food flavourings (vinegar) & cleaning products
Everyday uses of alkalis
Cleaning products
sulfuric acid chemical name is
hydrogen sulfate
hydrochloric acid chemical name is
hydrogen chloride
Nitric acid chemical name is
hydrogen nitrate
