How was Chemistry Paper 32?

[IbtiCool]

Mine was Ok. Just had issues with the last part. How about your's?

 

[sara abdul razzaq]

it was easy alhumdulilah

 

[IbtiCool]

It has been 24 hours now. Let's discuss.

 

[IbtiCool]

In the test for H+ ions, what was the test? I spent 30 plus minutes on it, after finishing the rest of the paper obviously, but I still couldn't do it. I thought that chromate would work, But the di-chromate given had no change in color. And what were the observations for NaOH and NH3 for FB4, FB5 AND FB6?

 

[sara abdul razzaq]

In the test for H+ ions, what was the test? I spent 30 plus minutes on it, after finishing the rest of the paper obviously, but I still couldn't do it. I thought that chromate would work, But the di-chromate given had no change in color. And what were the observations for NaOH and NH3 for FB4, FB5 AND FB6?

1st test was add magnesium ribbon and a lighted splint""pop""is heard da 2nd one was potassium dichromate it turned yellow for fb5 and 6

fb4=manganese chloride
fb5=iron(lll)nitrate
fb6=zinc sulfate

i got these results!

 

[sara kamal]

please tell wat did u guys wrote about the error of balance???and wether the student was correct while taking double volume of acid?i will be glad....and wat was the answer of last question?

 

[IbtiCool]

please tell wat did u guys wrote about the error of balance???and wether the student was correct while taking double volume of acid?i will be glad....and wat was the answer of last question?

I am not sure. I wrote that as the acid was already in excess, it won't make a difference

 

[saroooor]

I had something in the graph the first one was straight one and other was decreasing right ?

 

[IbtiCool]

Depends on your results. Mine and everybody else's from the center I gave from had both straight lines, and a decreasing line joining them