Big flames, tiny sparks, a sweet smell, a foul stink, something getting hotter or colder, a loud bang and a gentle fizzing are signs of a chemical reaction
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Are all changes chemical reactons
No, if you heat something, for example chocolate, you still have chocolate, so that is a physical reaction.
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When using acids and alkalis...
... wear goggles and cover up your skin as well as always standing up, tying back long hair, not running and usin common sense.
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How to make acids weaker
add water to the solution.
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what is Ph
It shows how strong or weak an acid or alkali is.
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Ph scale
from 1 to 14
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Ph scale colours
Rom the strongest acid to the strongest alkali, the colours are red, orange, yellow, green, blue, pink, purple.
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concentration
this is how strong an acid or alkali is
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why is strong acid strong
more of the hydrogen chloride particles have split up
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Neutralisation
The correct amount of acid put together with the correct amount of alkali = water
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Other cards in this set
Card 2
Front
Are all changes chemical reactons
Back
No, if you heat something, for example chocolate, you still have chocolate, so that is a physical reaction.
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