Chemistry unit 1 6CH01 Discussion! :)

[DC1313]

How was Jan 2013 better.....that was the worst chemistry as paper ever made!!!!!!

i know! it was horrible.
what did you write for the very last question?

 

[cardude456]

Somehow managed to score a B in jan...am not even gonna get a C this time..:'(.. Wht was the percentage yield??

i got 50 something percent!!

 

[cardude456]

Somehow managed to score a B in jan...am not even gonna get a C this time..:'(.. Wht was the percentage yield??

Why were you re-sitting if you got a B??????????????

 

[Zahidur]

The -115 was the enthalphy change for the part where NaHCO3 is added to sulfuric acid. What was your answer for the Hess Law cycle calculation?

 

[blossom edward]

what...........??? i got - 115!!!

people....wait the energy question the enthalpy change that was for 2 marks wasnt it -114
and the next part hess's law...i got +705.2 smthn...it was supposed to be +ve coz decomposition is an endotherimic raction

 

[cardude456]

The -115 was the enthalphy change for the part where NaHCO3 is added to sulfuric acid. What was your answer for the Hess Law cycle calculation?

The 5 mark one........???

 

[IGCSE Abdullah]

what were the products of hess cycle? and the calculation of hess cycle?? what was the answer?? craking of alkene appratus?? please answer them!!!

 

[cardude456]

OH MY GOD.............I DIDNT CALCULATE THE HESS'S LAW THING........OH GOD!!!!!!!!!

 

[blossom edward]

OH MY GOD.............I DIDNT CALCULATE THE HESS'S LAW THING........OH GOD!!!!!!!!!

if u have completed the diagram...u would be getting some marks i guess

 

[DC1313]

what were the products of hess cycle? and the calculation of hess cycle?? what was the answer?? craking of alkene appratus?? please answer them!!!

products i put : NaCl, CO2, and H2O. I balanced it too but forgot the numbers now
final answer, i got +96.1 or something
cracking of alkene : horizontal tube with cotton wool soaked in dedocane or dodecane or something XD then heat with a catalyst and collect over water.

please tell me what you wrote for the very last question in the paper!

 

[cardude456]

products i put : NaCl, CO2, and H2O. I balanced it too but forgot the numbers now
final answer, i got +96.1 or something
cracking of alkene : horizontal tube with cotton wool soaked in dedocane or dodecane or something XD then heat with a catalyst and collect over water.

please tell me what you wrote for the very last question in the paper!

The atom economy is 100% because there are no waste products formed......thats what i wrote!!!

 

[DC1313]

The atom economy is 100% because there are no waste products formed......thats what i wrote!!!

i wrote 100% because its an addition reaction you think thats enough?

 

[Choco<3]

i wrote 100% because its an addition reaction you think thats enough?

Yup.

 

[Manasa]

ppl wat was the answer to the first qstn in section B with the isotope of Iodine part?? n the country suggestion n all??

 

[chathumus]

Guys for the NaHCO3 I said to neutralise vinegar? Is that completely silly?

 

[chathumus]

Country, most of us from my school said Japan

 

[abdul aziz123]

ppl wat was the answer to the first qstn in section B with the isotope of Iodine part?? n the country suggestion n all??

country i wrote japan lol tsunami hahah!

 

[cardude456]

I said the UK....???

 

[DC1313]

country i wrote japan lol tsunami hahah!

me too! tsunamis and earthquakes lol

 

[abdul aziz123]

Mcqs were tricky a bit !
the proton question which element did u write? i wrote xenon?
hess law answer was + 97 KJ mol-1 !
yield was 53-54%
why hydrogencarbonate was used i wrote neutralises teh acid :/
which has highest inoization energy i wrote bromine !