IAL Edexcel Chemistry Unit 3 Jan 2020

How did you guys find the paper? Personally i thought it went way better than the unit 2 paper. And what did you guys get for the percentage purity question? I got around 56% (i forgot the actual number)

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Reply 1

Redowan Uddin

Original post by student3692

Yep that's the answer

Reply 2

Redowan Uddin

What was e enthalpy change tho

Reply 3

student3692

Original post by Redowan Uddin

What was e enthalpy change tho

I got around -463 kJ mol. What did you get?

Reply 4

Mehz_19

I got something like -806 KJ/mol . I didn't even draw the diagram of fractional distillation properly . 😭

Reply 5

Mehz_19

There was a question like barium chloride and hydrochloric is added to ammonium sulfate and ammonium nitrate. What would be seen ? What's the answer for it ?

Reply 6

Redowan Uddin

So I got 421.kj

Original post by student3692

I got around -463 kJ mol. What did you get?

Original post by Mehz_19

I got something like -806 KJ/mol . I didn't even draw the diagram of fractional distillation properly

So I got the answer of 421.7
But did the question ask for 3 significant figure as I gave 4
Also I forgot the negative sign (again)💔💔😭😭😭😭

(edited 4 years ago)

Reply 7

Redowan Uddin

Do we need to draw fractional distillation
I gave simple😵😵😵😵😵😱😱😱😱😵😵😵
(Plz let it be simple or just distillation)

(edited 4 years ago)

Reply 8

Redowan Uddin

Original post by Mehz_19

There was a question like barium chloride and hydrochloric is added to ammonium sulfate and ammonium nitrate. What would be seen ? What's the answer for it ?

For sulphate it was white ppt
No change for nitrate

Reply 9

Mehz_19

Original post by Redowan Uddin

For sulphate it was white ppt
No change for nitrate

I wrote white put for both of them .

Reply 10

Mehz_19

What was the observation for iodide ion and chloride/bromide ion not sure which one ? Tissue was the first question in the beginning

Well rip then

This*

Me confused as well
I think it is red brown as iodine is aq

Reply 14

Mehz_19

I wrote yellow for iodine

Reply 15

Mehz_19

I didn't see whether aq was written in the question .

Reply 16

Redowan Uddin

Original post by Mehz_19

I wrote yellow for iodine

Should be OK as iodine also give yello color

Reply 17

Mehz_19

Original post by Redowan Uddin

Do we need to draw fractional distillation
I gave simple😵😵😵😵😵😱😱😱😱😵😵😵
(Plz let it be simple or just distillation)

It could be both not sure though but I couldn't remember the diagram at that moment .

Reply 18

Mehz_19

Original post by Redowan Uddin

So I got 421.kj

So I got the answer of 421.7
But did the question ask for 3 significant figure as I gave 4
Also I forgot the negative sign (again)💔💔😭😭😭😭

Shouldn't it be kj/mol bcz the question was enthalpy change which is del H ?