CHEMISTRY GCSE TOPIC 3- CHEMICAL CHANGES

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This is GCSE topic 3 chemistry edexcel, "chemical changes"

Last updated 5:13 PM on 9/7/26

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1

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what do we use indicator papers for?

to work out whether a solution is acid, alkali, or neutral

2

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what are the 4 indicators we use at GCSE?

universal, litmus, methyl orange, phenolpthalein

3

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what is another word for solute?

a solid

4

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how is a solution made?

by dissolving a solid in water

5

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what does a concentrated solution contain?

lots of dissolved solids (solutes) in a volume of water

6

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what does a dilute solution contain?

only a small amount of solute dissolved in water

7

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what is the formula for concentration?

concentration= amount of water dissolved (g) / volume (dm cubed).