Prepare potash Alum and submit it for inspection
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ok i am preparing in lab after some time i will show u to inspect
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Steps for the preparation of potassium alum are discussed below.
Explanation:
- Substances required :
- 250 ml flask
- Beaker
- Scrap aluminium
- Potassium hydroxide solution
- 6 M sulphuric acid
- Water bath
- Ethanol.
- The scrap aluminium is first digested with potassium hydroxide solution.
- Aluminium reacts with potassium hydroxide forming potassium aluminate.
- 2KOH + 2Al +6H2O = 2 KAl(OH)4 + 3H2
- This salt solution is then separated and treated with slightly excess sulphuric acid.
- This reacts with the salt firstly precipitating aluminium hydroxide and then again soluting it forming aluminium sulphate.
- 2 KAl(OH)4 + H2SO4 = K2SO4 + Al(OH)3 + 2H2O.
- 3 H2SO4 + 2Al(OH)3 = Al2(SO4)3 + 6H2O.
- This aluminium sulphate solution is then separated and heated to evaporate the excess water and make the solution concentration.
- On adding ethanol to the cooled solution, the potash alum comes out.
For more information about potash alum,
https://brainly.in/question/9938233
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The weight of pure potash alum (k2so4.al2(so4)3.24h20 which contains 0.64 kg oxygen is ?
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