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Year 8
Chemistry
Lesson 2 Acids and Alkalis
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Neutralisation is a
chemical
change.
Acid + alkaline =
salt
+
water
A salt
is a type of chemical that is related to an acid and is usually made from acids.
Sodium Carbonate (Na2CO3)
is added to ethanoic acid to neutralise it.
It takes
20cm3
of Sodium Carbonate to produce a pH of
7
Limewater
is used tot test for carbon dioxide.
A reaction produced bubbles of carbon dioxide (CO2) gas. How would you identify the gas?
Bubble the gas through limewater. The limewater turns milky white.