Unit 3B Chemistry :) How was the exams? Comment here :P

[jtbteddy]

I got 120 UMS for chemistry unit 1

What is the maximum?

 

[qwerty123123]

What is the maximum?

120

 

[jtbteddy]

120

wooow, so you got 100%? that's brillliant! how did you studyy so well for it?

 

[qwerty123123]

wooow, so you got 100%? that's brillliant! how did you studyy so well for it?

Thank you. I only had chemistry in January, so I had a lot of time to revise. Basically made notes from mark-schemes, went through revision book and did all past papers twice 0.o

 

[ella kamau]

any unofficial marking schemes?

 

[jtbteddy]

Thank you. I only had chemistry in January, so I had a lot of time to revise. Basically made notes from mark-schemes, went through revision book and did all past papers twice 0.o

woow, thanks for the tips:$ hope i do well too

 

[svenas]

For question 1 - I wrote something about the reaction being very exothermic/volatile
2 - I think it should have been something about the drying agent but I wrote some fake stuff (water/needs further distillation)
3-

i wrote reaction is exothermic only...is it okay?

 

[aniekan]

i wrote reaction is exothermic only...is it okay?

that's correct.

 

[svenas]

that's correct.

and bro for the question which says WHAT YOU SEE.....i thnk writing bubbles seen and solid decreases in size is wrong? i wrote similar to that stuff...

 

[svenas]

alex 2 - check my last post

 

[aniekan]

and bro for the question which says WHAT YOU SEE.....i thnk writing bubbles seen and solid decreases in size is wrong? i wrote similar to that stuff...

No bubble is correct _ either you write bubble of gas or effervescence. Solid decrease in size? that sounds wrong because the reactants are HI(g) and H2SO4(aq) there is no solid . If you said a "grey solid" is formed that's right.

 

[svenas]

No bubble is correct _ either you write bubble of gas or effervescence. Solid decrease in size? that sounds wrong because the reactants are HI(g) and H2SO4(aq) there is no solid

some people say that what u c shud be stuff like yellow solid ...... not bubbles and tht stuff

 

[aniekan]

some people say that what u c shud be stuff like yellow solid ...... not bubbles and tht stuff

I disagree _ when you have the first reaction, you will get HI(g) which will form bubble ; some of it will escape while the remaining will react with H2SO4 to form Hydrogen sulfide gas( again another bubble) and Iodine. You'll also get misty fumes

 

[svenas]

I disagree _ when you have the first reaction, you will get HI(g) which will form bubble ; some of it will escape while the remaining will react with H2SO4 to form Hydrogen sulfide gas( again another bubble) and Iodine.

then thats good for me and u bro !

 

[aniekan]

then thats good for me and u bro !

lol sure