Acids and Alkalis Flashcards
What are indicators?
They are coloured dyes that often come from plants such as red cabbage and beetroot.
What makes indicators change colour?
Acids
What colour does Litmus change into when is in acids?
Red.
What hazards do acids often have?
Corrosive
What is it called when acids and alkalis cancel each other out?
Neutralisation
When is a new substance always formed?
In a chemical reation
Are chemical reactions easily or not easily reversed? What is this called?
Not easily. Called irreversible.
When isn’t a new substance formed?
Physical change
Are physical changes easily or not easily reversed? What is this called?
Easily. Called reversible.
What are signs of a chemical reaction?
Colour change, energy change, or a gas being given off.
Some Metals+ Acids=
Hydrogen
Acids+carbonates=
Carbon Dioxides
What sound does hydrogen burn with?
Squeaky pop
What does Carbon Dioxide do to limewater?
Turns it milky
What does Carbon Dioxide do to a lighted splint?
Put it out
