B (Salters) F331 (Chemistry for Life) 22nd May 2015 [Official Thread]

Reply 80

Jessiocar

9

Hess' law barely comes up. Out of all the papers its only come up like three times though

Reply 81

TheLegalDealer

9

What did the gold foil experiment prove ??

Reply 82

misteltain

16

That was an alright paper. Definitely got the last question wrong because it was [SiO4]4- and I derped and wrote [SiO2]2-. Also got the cyclopropane angle wrong, wrote 120 instead of 60. What about everyone else?

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Reply 83

shooting_stars

5

How did you guys find the exam? I thought it was quite good tbh :smile:

Reply 84

Bellbird

2

it was quite good, but i have lost 3 marks i think, but thats it i am pretty sure.
What was the ans for period and group? I put the number of electron shell and outer electron, its that fine?

Reply 85

vuvuzela

OP

3

Absolute gift of an exam, providing the last question gave SiO3 2-??????

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Reply 86

shooting_stars

5

Original post by misteltain

That was an alright paper. Definitely got the last question wrong because it was [SiO4]4- and I derped and wrote [SiO2]2-. Also got the cyclopropane angle wrong, wrote 120 instead of 60. What about everyone else?

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The predicted one is 109 because there are 4 areas of electron density around the central carbon atom but the actual is 120

Oh wait im wrong the predicted one is 109 but the actual is 60...

(edited 8 years ago)

Reply 87

shooting_stars

5

Original post by Bellbird

it was quite good, but i have lost 3 marks i think, but thats it i am pretty sure.
What was the ans for period and group? I put the number of electron shell and outer electron, its that fine?