I'm not interested in becomming an NHS Biomedical Scientist (who screen for diseases etc. - http://www.nhscareers.nhs.uk/explore-by-career/healthcare-science/careers-in-healthcare-science/careers-in-life-sciences/biomedical-science/), I'm more interested in post-graduate research and the biomedical degree sets me up perfectly for that with it's combination of biochemistry and human biology.

Reply 126

MSamuel

2

Original post by geor

Yeah I might do that - it's not really the knowledge though it's the questions? I never really get what they are asking for? :confused:

This is me all over, I know the ins and outs of the syllabus but when it comes to the questions, my mind goes blank cos I never know what they're looking for yet I look at the mark scheme and I knew I could have answered that it's so frustrating! :mad:

Reply 127

Zoeyyy

guys, I was doing the cgp revision guide and theres this question I came across
What type of substance is formed when a hydrogen halide is passed through water?

I know the answer to this might be pretty simple but I don't know maybe its just all the staying up and stressing out cause of the exams thats messing with my head :P

Reply 128

phaseshift

12

Original post by Zoeyyy

guys, I was doing the cgp revision guide and theres this question I came across
What type of substance is formed when a hydrogen halide is passed through water?

I know the answer to this might be pretty simple but I don't know maybe its just all the staying up and stressing out cause of the exams thats messing with my head :P

What do you think the answer is..?

Reply 129

Zoeyyy

Original post by HarryMWilliams

What do you think the answer is..?

Acidic solution?
I just get confused about weird stuff at weird times excuse me for that Lol

Reply 130

phaseshift

12

Original post by Zoeyyy

Acidic solution?
I just get confused about weird stuff at weird times excuse me for that Lol

It is a strange question, nothing like that has ever come up in my Unit 2 adventures I dont think, anywhoo the reaction goes:
H₂O + HBr ---> H₃O⁺ + Br₂.

Reply 131

F1's Finest

21

Original post by HarryMWilliams

It is a strange question, nothing like that has ever come up in my Unit 2 adventures I dont think, anywhoo the reaction goes:
H₂O + HBr ---> H₃O⁺ + Br₂.

Shouldn't Br- be present instead of Br2 as a product??

But yeah,

Original post by Zoeyyy

Acidic solution?
I just get confused about weird stuff at weird times excuse me for that Lol

You do get an acidic solution. The hydronium ion makes it acidic.

Reply 132

Eljamaispa

17

Original post by Zoeyyy

guys, I was doing the cgp revision guide and theres this question I came across
What type of substance is formed when a hydrogen halide is passed through water?

I know the answer to this might be pretty simple but I don't know maybe its just all the staying up and stressing out cause of the exams thats messing with my head :P

H3O+

Posted from TSR Mobile

Reply 133

Eljamaispa

17

Original post by HarryMWilliams

It is a strange question, nothing like that has ever come up in my Unit 2 adventures I dont think, anywhoo the reaction goes:
H₂O + HBr ---> H₃O⁺ + Br₂.

Balance it. H2O + HBr -> H3O+ + Br-

Posted from TSR Mobile

Reply 134

Zoeyyy

thanks guys :biggrin:

also, what would you observe when bromine water is mixed with potassium chloride solution?

Original post by HarryMWilliams

It is a strange question, nothing like that has ever come up in my Unit 2 adventures I dont think, anywhoo the reaction goes:
H₂O + HBr ---> H₃O⁺ + Br₂.

Yeah 'cause its not an exam style question, just a practice question. And I wanted to make sure I dont have any doubts so Im on the safe side :biggrin:

Reply 135

Relaxedexams

2

Original post by Zoeyyy

thanks guys :biggrin:

also, what would you observe when bromine water is mixed with potassium chloride solution?

No reaction. No change.

Posted from TSR Mobile

Reply 136

Zoeyyy

Original post by Relaxedexams

No reaction. No change.

Posted from TSR Mobile

And why is that?

Reply 137

Relaxedexams

2

Original post by Zoeyyy

And why is that?

Chlorine is more reactive than bromine therefore bromine cannot displace it.

Posted from TSR Mobile

Reply 138

F1's Finest

21

Original post by Relaxedexams

Chlorine is more reactive than bromine therefore bromine cannot displace it.

Posted from TSR Mobile

This.

Reply 139

SharminaSyeda

I do AQA but them topics are basically what I do:P I hate group 7 and redox! Ughhhh there is SOOO MUCH TO REMEMBER! Like I hate how you have to remember the observations for each halide, so annoying :/ And redox, well need I say anything about that? Half equations will be the cause of my death

Edexcel - Chemistry Unit 2 - 4 June 2013

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you