topic 2 Flashcards
what colour is phenolphthalein when in acid
colourless
what colour is phenolphthalein in an alkaline
pink
what colour is methyl orange in an acid
red
what colour is methyl orange in an alkaline
yellow
what colour is litmus in acid
red
what colour is litmus in alkaline
blue
what colour is blue litmus paper in acid and alkaline
acid=red
alkaline=blue
what colour is red litmus paper in acid and alkaline
acid= blue
alkaline= red
what is the ph scale
it is a measurement of how acidic and alkaline a substance is
what ph is neutral
ph 7
what ph is acidic
lower than ph 7
what ph is alkaline
higher than ph 7
what solution do acids produce
H+
what solutions do alkaline produce in solutions
OH
what is a neutralisation
Neutralisation is when an acid and a base react
what is the equation for neutralisation
H( ) + OH = H2O
what is titration
titration is a controlled chemical reaction
what are the steps to titration
- to fill a burette with 100cm3 of acid with the base at the line
2.use a 25cm3 pipette to add 25cm3 of alkaline to a flask
- add drops of indicator add the acid and the base to flask
- add the acid and the base to flask
- record the titration
- repeat until you have consistent results
