Chemistry Topics 37, 38

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T37- What are the soluble salts?
Sodium, ammonium, potassium, nitrates, Chlorides, sulfates.
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T37- What are the insoluble salts?
Silver chloride, vrium sulfate, calcium sulfate. Carbonates (unless span.)
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T37- How would you make a soluble salt?
Acid + insoluble base (metal oxides/cabronates/hydroxides.)
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T37- How would you make an insoluble salt?
A precipitation reaction. Two solutions containing the ions for the salt you want to make.
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T38- Why are titrations used?
To find out concentrations. (how much acid is needed to neutralise an alkali, vice versa.)
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T38- How would you carry out a titration?
1) Use pipette and pipette filler, add acid/alkali to flask with indicator. 2) Fill burette with alkali/acid BELOW EYE LEVEL. 3) use burette, slowly add the contents to flask. swirl simultaneously. 4) stop when colour change. 6) record volume added
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T38- How would you increase the reliability?
REPEAT.
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T38- How would you work out the concentration of the unknown substance?
1) Moles of the known substance = Concentration x volume. 2) write balanced equation to work out moles of unknown. See ratio 3) divide or multiply according to this ratio. 4) Concentration of the unknown is moles/ volume added from burette.
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Card 2

Front

T37- What are the insoluble salts?

Back

Silver chloride, vrium sulfate, calcium sulfate. Carbonates (unless span.)

Card 3

Front

T37- How would you make a soluble salt?

Back

Preview of the front of card 3

Card 4

Front

T37- How would you make an insoluble salt?

Back

Preview of the front of card 4

Card 5

Front

T38- Why are titrations used?

Back

Preview of the front of card 5
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