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  1. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    Which volume?
  2. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    Impurities does not react with sulphuric acid
  3. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    Many students messed up we had to multiply by 10 I'm pretty sure because we used 25cm3 and the volume in flask was 250cm3
  4. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    Ohh and how did u calculate percentage purity... 1) 0.05xtitre/1000 2) answer(1)x 2 3) answer(2)x10x84 4) answer3/mass x 100 Is it correct?
  5. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    But there was no effervescence I repeated it 2-3 times
  6. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    What was the anion in question 2?..I wrote unknown and its wrong:cry::cry:
  7. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    33
  8. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    Ohh..we were given 20min extra due to gas problem so we had a lot of time for this question:sneaky::sneaky:
  9. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    0.04
  10. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    Why lid is placed while cooling? And improvement? I wrote to prevent residue loss and improvement use larger mass so that uncertainty will be reduced... And what was your percentage purity ?mine was 99.5%
  11. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    FA7 because gas was evolved that turned limewater milky though limewater didn't turn milky but we had to write that
  12. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    I messed up equation of decomposition in question 2 last part wrote Na2O instead of Na2CO3
  13. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    What was your titre volume mine was 24.45?
  14. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    Went good expecting 31-32...guess was spot on...what about u?
  15. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    nope i just did 2-3 calculations
  16. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    thanks:)
  17. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    in latest ms its written about oxygen that it relights glowing splint so am bit confused
  18. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    i have heard that acid will also be given in question 3 so hydrogen gas is evolved with acids so do we have to test it with lighted splint?
  19. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    yup many students messed it up and those who got their answer ri8 didnt give to 6sf
  20. S

    CHEMISTRY PAPER 3 DOUBTSS!!

    nope its confirmed...but i messed up my physics practical ,will be scoring 11-12 marks in 1st question:cry::cry:
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