chem practical 33

[anonymous1122]

What exactly was to be done in q2?
45 cm3 of fa3 were to be added or total vol of solution had to be 45cm3?
And what was the Mr in q1?

 

[hamzashariq]

My Mr was 126, and the titre was 23.60 cm3

 

[hamzashariq]

In question 2 you had to add FA3 in portions of 5cm3, until a total volume of 45 cm3 had been added.

 

[anonymous1122]

In question 2 you had to add FA3 in portions of 5cm3, until a total volume of 45 cm3 had been added.

Meaning total of 60 cm3 in the cup in the end?

 

[anonymous1122]

I got 25.05 as the mean titre and 131 Mr ._.

 

[hamzashariq]

Meaning total of 60 cm3 in the cup in the end?

yeah

 

[hamzashariq]

I got 25.05 as the mean titre and 131 Mr ._.

close enough

 

[anonymous1122]

close enough

How many marks would be deducted if i performed the experiment wrong
I didnt add till 45 cm3 as i read it wrong and thought total volume to be 45 cm3 of solution
Would i still be getting marks for graph since i fulfilled all the requirements and 2-3 out of 4 for table?

 

[hamzashariq]

How many marks would be deducted if i performed the experiment wrong
I didnt add till 45 cm3 as i read it wrong and thought total volume to be 45 cm3 of solution
Would i still be getting marks for graph since i fulfilled all the requirements and 2-3 out of 4 for table?

I'm not sure, but i think you should get marks for the calculations you performed, provided you performed them correctly.

 

[anonymous1122]

I'm not sure, but i think you should get marks for the calculations you performed, provided you performed them correctly.

Hopefully

 

[aali81060]

Guys what was the energy released in Q2

 

[hamzashariq]

Guys what was the energy released in Q2

I got -55 KJ/mol

 

[Abhishek Agarwal]

I got -55 KJ/mol

Me too!
Got 120 as the Mr though!

 

[Choi WW]

For the last question of q3(conclusion part), did you guys' solution turn brown with nh3 or naoh(oxidised)?

 

[Master Minds]

what were the ions in question 3 FA6?

 

[anonymous1122]

For the last question of q3(conclusion part), did you guys' solution turn brown with nh3 or naoh(oxidised)?

No mine didnt :/
So i wrote that student conclusion was incorrect ._.

 

[anonymous1122]

what were the ions in question 3 FA6?

Ammonium ion
Iron II ion
Sulphite ion

 

[hamzashariq]

Ammonium ion
Iron II ion
Sulphite ion

Sulfate instead of sulfite.

 

[Choi WW]

No mine didnt :/
So i wrote that student conclusion was incorrect ._.

OH..... Did anyone's solution change? I don't want to be alone.....

 

[anonymous1122]

D

Sulfate instead of sulfite.

It it oxidize?
Last part of q3?