indicators, bases and alkalis
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19 Terms
indicator
a substance which changes colour depending on pH
what colour does litmus indicator turn in an acid?
red
what colour does methyl orange indicator turn in an acid?
red
what colour does methyl red indicator turn in an acid?
red/ pink
what colour does phenolphthalein indicator turn in an acid?
colourless
what colour does universal indicator turn in an acid?
red, orange, yellow
what colour does litmus indicator turn in an alkali?
blue
what colour does methyl orange indicator turn in an alkali?
yellow
what colour does methyl red indicator turn in an alkali?
yellow
what colour does phenolphthalein indicator turn in an alkali?
magenta
what colour does universal indicator turn in an alkali?
blue, purple
what colour does litmus indicator turn in a neutral solution?
purple
what colour does methyl orange indicator turn in a neutral solution?
orange
what colour does methyl red indicator turn in a neutral solution?
red
what colour does phenolphthalein indicator turn in a neutral solution?
colourless
what colour does universal indicator turn in a neutral solution?
green
base
a substance which neutralises an acid
alkali
a soluble base
give 5 examples of compounds which neutralise acids
metal oxides
metal hydroxides
metal carbonates
ammonia
ammonium hydroxide
Note 
Flashcards (27)