C2f-acids and bases Flashcards
What kind of changes do indicators show?
- PH changes
- sudden or gradual changes
- colour changes over different PH ranges
What is an alkali?
A soluble base
What is a universal indicator?
A combination of dyes that changes colour
What colour does acid turn litmus paper?
Red
What colour does alkaline turn litmus paper?
Blue
What colour does litmus paper turn when the solution is neutral?
Purple
What is the word equation for neutralisation?
Acid + base –> salt + water
What is the ph of an acid determined by?
The concentration of H+ ions
What do acids contain?
H+ ions
What do alkalis contain?
OH- ions
What is the symbol equation for the reaction of ions in neutralisation?
H+ + OH- –> H2O
What can neutralise an acid?
A base/ alkali and vice versa
What is H2SO4?
Sulfuric acid
What is HNO3?
Nitric acid
What is HCl?
Hydrochloric acid
Word equation for reaction of acid and carbonate?
Acid + Carbonate –> Salt + water + Carbon dioxide
Word equation for reaction of acid and ammonia ?
Acid + Ammonia –> Ammonium Salts
What colour does acid turn litmus paper?
Red
What colour does alkaline turn litmus paper?
Blue
What colour does litmus paper turn when the solution is neutral?
Purple
What is the word equation for neutralisation?
Acid + base –> salt + water
What is the ph of an acid determined by?
The concentration of H+ ions
What do acids contain?
H+ ions
What do alkalis contain?
OH- ions
