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NEUTRALISATON
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What sort of reaction happens when an acid and an alkali are mixed?
A neutralisation reaction happens
What do farmers spread lime onto acidic soil?explain why they do this?lb 268 q6
Why is an alkaline substance dropped into lakes in some countries?
In some countries the lakes have become very acidic as a result of acid rain, this changes the pH and plants and animals can no longer live there. These countie
Where does the acid in your mouth come from?lb268 q2
The acid in your mouth comes from the millions of bacteria there. When bacteria feed they produce acid
Why is toothpaste alkaline?lb 268 q1
Toothpaste is alkaline so that it can neutralise the acid in your mouth and help to stop your teeth decaying
Why is neutralisation useful in real life?
To make harmful substances safe
Give one example of neutralisation in daily life?
Antacids neutralise stomach acid
What safety equipment should be worn?
Safety glasses( goggle)
What piece of equipment add acid very accurately?
A burette
Zinc+ sulfuric acid ------------> _______________ + hydrogen gas
Zinc sulfate
Metal + acid -------------> salt + ---------------?
Hydrogen gas
Hydrochloric acid + sodium hydroxide--------> ________________+ water
Sodium chloride
What is formed in a neutralisation reaction?
Salt and water
What type of changes is neutralisation?
A chemical change
Is water acidic , alkaline or neutral
What colour shows a weak acid?
Yellow or orange
What does universal indicator do?
It shows the pH of a solution by changing colour
What colour shows a strong alkali?
Purple or dark blue
What pH range shows strong acids?
pH 1 - 3
What colour does universal indicator show at pH?
Green(pH7)
What does neutral mean?
Neutral means neither acidic nor alkaline.
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