10. Thermal stability of Gp2 carbonates and hydroxides

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10 Terms

1
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What happen to all Gp2 carbonates?

Undergo thermal decomposition to produce metal oxide and carbon dioxide gas

2
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What compounds all undergo thermal decomposition?

Gp2 carbonates

3
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What is thermal decomposition?

Splitting a compound by heating it

4
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What are all the carbonates and oxides produced?

All white solids

5
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What does thermal stability do down the group?

Thermal stability increases

6
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Why does thermal stability decrease down the group?

More heat is needed to break it down and the more reactive the metal, the more stable it is

7
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Show the thermal decomposition of calcium carbonate

CaCO₃(s) → CaO(s) + CO₂

8
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What is the test for the thermal decomposition of calcium carbonate?

1) Heating and bubbling gas through limewater turns it milky 2) add acid and bubble gas through limewater

9
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How would you test for calcium sulphate?

Add BaCl2 forms white ppt

10
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How do you test for calcium hydroxide?

pH paper shows its alkali