today in science we have been working on a experiment on the ph levels and colours. This task was to make the rainbow out of sodium hydroxide, hydrochloride acid and universal indicator.
stuff you need.
1 test tubes
2 sodium hydroxide
3 hydrochloride acid
4 universal indicator.\
method .
1 take a test tube rack with 1 boiling tube at each end of the rack and 4 test tubes.
2 half fill the boiling tube at one end with sodium hydroxide.
3 half fill the boiling tube at the other end with hydrochloride acid
4 fill each test tube with 5 drops of universal indicator
5 using the pipette you will add drops of the acid or alkaline to the test tube to make colours of red orange yellow green blue violet
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