Chemistry Practical 34 GT

[ahlam yume]

The loss in mass was low, some people i know even got like 2%. My loss in mass was o.o6 i guess.

my loss in mass was 0.01g

 

[samantha liyanage]

I dont remember mass. titre was 24.30 I guess.

omg same

 

[-Asad_Haider-]

Titre was 25.6 (may be but it was in 25s), percentage in first 88%, mass loss was hardly any... I heated it for 1 hr exact ad high flame so high that event crucible went black but all I could get was loss of 0.05g so percentage in 2nd was around 6% for me..!! Ions were very easy Mg, Al and So4 or So3(although I wrote So4, forget to wrote so3) Al was discarded when they further said to mention a test(it was adding NaOH), in second part ions were Zn, I and Co3.

Paper was difficult both Q1 and Q2 were tough... MUCH DIFFICULT than variant 33..!! :/ :/ :/ Umeed ha acha ajaenga INSHALLAH!!

hahahahha dude luck was on your side that you didn't write sulfite

 

[unkidd]

F

hahahahha dude luck was on your side that you didn't write sulfite

FE was also present

 

[unkidd]

my center titre value was coming as 21

 

[-Asad_Haider-]

F

FE was also present

iron?

 

[unkidd]

yup i got coloured compounds green and grey

 

[-Asad_Haider-]

yup i got coloured compounds green and grey

sorry man but there wasn't any iron

 

[hamaas]

if someone has a in p1 a in p2 and c in practicl then what will be the overall grade?

 

[Kamihus]

if someone has a in p1 a in p2 and c in practicl then what will be the overall grade?

A or B but depends by how many marks you have the A.

 

[hamaas]

well if i am taking cie and solve papers of other boards as well such as ocr and aqa,will it be helpful for me to get distinction

 

[Snowysangel]

Will they penalize us if we wrote sulfite?

 

[Sohail Shaheen]

I got the titre as 20.7. In Q i had NO mass loss, messed up,

 

[Sohail Shaheen]

Howcome sulfite has the probablity, the ppt was insoluble. no?

 

[unkidd]

it was sulphate if i am not wrong?

 

[unkidd]

it was sulphate. right?

 

[Sohail Shaheen]

Yes FB 6 had sulphate.. MgSO4 .
But, idk y people are saying k sulfite was also the possible ion.. Was it?

 

[unkidd]

I got the titre as 20.7. In Q i had NO mass loss, messed up,

dont worry bro i messed up both q2 and q3

 

[maestro maisam]

What improvements did you suggest and which procedure did you favour in Q 2?

For Question2 my mass loss was 0.05 g !! I dont remember exactly.. Initially the mass was 2.01g .. So what i did was i subtracted this 2.01-0.05 to get the remaining mass which was like 1.96g.. And then i found the percentage by (1.96/2.01)*100 .. I guess i didn't read the question properly...

Improvements were: Question 2 was less accurate , to get more accurate results heat crucible for longer time period until you get a constant mass. Lid the crucible for greater degree of mass loss.. What were your answers????

I GUESS I MESSED UP WITH THIS ONE!!

 

[maestro maisam]

Ques3: Ion's for first part were Mg, Al, Suplhate and Sulphite --> After doing confirmatory test it was Mg..
For Second part ions were Carbonate, Zn and Iodide!