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Chem.p34 answer discussion...

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The paper was easy but i couldnt do it on time and i burned my fingure in 1st qs :cry: what was the titration reading ??
 
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The paper was easy but i couldnt do it on time and i burned my fingure in 1st qs :cry: what was the titration reading ??
haha ... sme here .. burned my thumb .... :p
reading was 13cm3 1st tritration and 22cm3 2nd titration
 
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fr the frst one i got 18 sumthn :/ and fr scnd one i got 19 sumthn :p
wat about the % mass?
and non metal\?
 
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The paper was easy but i couldnt do it on time and i burned my fingure in 1st qs :cry: what was the titration reading ??
meee despite of wearing goggle i droped KMNO4 on my face while i was removing the funnle from the burette..:):p
 
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i didnt do well....but i left everything on Allah now...wat ever we deserve we will get it InshaAllah...better to pray dan wasting our time in regrating and all....:)
 
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i have great deviation aapprox around 10cm3 from the corect one but i did all calculations corect how many marks will i loose .?
Only 2 marks the rest depends upon your method of calculations and im pretty sure caz i appeared in variant 3 and my titre was 8cm about the invigilators :p asked my sir he said only 2 marks :D
 
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The titre value for step 1 was : 15.50 cm3
The titre value for step 2 was: 22.55 cm3

The percentage by mass : 43% but don't worry, whosoever attempted this part will be given full marks as there was a misprint in the paper for the formula given.

The non metal was Nitrogen.

Fe2+ was in FB9.

The last part of salt analysis was that if KMnO4 was added to FB9, what happened.
You could write:
1) Colour change from purple to colourless.
2) Fe2+ will be oxidized to Fe3+ so red-brown ppt will be formed.
 
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evryone gets a diffrnt titre value ryt? :S
fr the last part i wrote ornge brown ppt seen :/
 

ass

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The titre value for step 1 was : 15.70 cm3
The titre value for step 2 was: 15.30 cm3

for both titrations almost the same.. ;)
 

N.M

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What was the answer for the last two parts of titration?
The part which talked abt pipette n burette measuring 25cm3?
N also what were the observations for the anion test?
 
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