Chemistry unit 2 6CH02 exam.How was it?

[Zainkhan]

I don't think that was one of the choices lol... they were;
A) intermolecular forces in water are stronger than that in hexane
B) the hexane molecules can't get in between the ions
C) energy is released when the ions are hydrated
D) the sodium and chloride ions can form hydrogen bonds with the water
... so I'm guessing you went for C?
That makes sense about the acid!
And I don't mean for the titration, I mean for the one about chlorine and bromine

I chose B)

 

[georgewest28]

^i chose B

 

[livlivliv]

I don't think that was one of the choices lol... they were;
A) intermolecular forces in water are stronger than that in hexane
B) the hexane molecules can't get in between the ions
C) energy is released when the ions are hydrated
D) the sodium and chloride ions can form hydrogen bonds with the water
... so I'm guessing you went for C?
That makes sense about the acid!
And I don't mean for the titration, I mean for the one about chlorine and bromine

I chose B)

you are probably right -_-
what did you put for the difference between the solutions (the question before the carbonate one)

 

[kcapfootball]

A) intermolecular forces in water are stronger than that in hexane
B) the hexane molecules can't get in between the ions
C) energy is released when the ions are hydrated
D) the sodium and chloride ions can form hydrogen bonds with the water

i chose A.. anyone else..?

 

[livlivliv]

A) intermolecular forces in water are stronger than that in hexane
B) the hexane molecules can't get in between the ions
C) energy is released when the ions are hydrated
D) the sodium and chloride ions can form hydrogen bonds with the water

i chose A.. anyone else..?

saaaame

 

[jtbteddy]

saaaame

C

 

[jtbteddy]

saaaame

The question said that compound whatever was more soluble in water than it was in hexane, so A can't be the answer because if intermolecular forces in water are stronger, it'd be harder for the compound whatever to break the bonds of water and dissolve in water, so it's answer C, compound whatever was an ionic compound i think so the dipoles of water make bonds with the ions of the compound whatever and allow it to dissolve quicker

 

[georgewest28]

Does anyone remember the answer to the equation where they were bubbling cl2 gas through br(aq) to get br gas? What did you write?

 

[aniekan]

Does anyone remember the answer to the equation where they were bubbling cl2 gas through br(aq) to get br gas? What did you write?

Cl2(g) + 2Br^-1(aq) ------> Br2(g) + 2Cl^-1(aq)

 

[georgewest28]

Cl2(g) + 2Br^-1(aq) ------> Br2(g) + 2Cl^-1(aq)

Were cl2 and br2 both gases?

 

[aniekan]

Were cl2 and br2 both gases?

Chlorine oxidize Bromide Ions to Bromine gas and Bromide Ion reduce Chlorine gas to Chloride ion

 

[georgewest28]

Chlorine oxidize Bromide Ions to Bromine gas and Bromide Ion reduce Chlorine gas to Chloride ion

Nice one! Colour change was?

 

[Zainkhan]

No.. bromine liquid is produced not gas

 

[georgewest28]

No.. bromine liquid is produced not gas

Are you sure? Well the colour change then would be colourless to orange..

 

[Zainkhan]

I just wrote a brown liquid forms.... guess i didnt read the qs properly

 

[aniekan]

Nice one! Colour change was?

pale yellow green. But i wrote as observation brown gas evolved

 

[DC1313]

Bromine is either liquid or aqueous as it's a solution, because standard state of bromine is liquid.

 

[Sara5396]

The paper was a lot better than unit 1 to me and MCQ's were not at all bad, section B had twisted questions( only some)while section C was OK but the last question for 4 marks was EPIC! I LOVED IT!

 

[georgewest28]

The paper was a lot better than unit 1 to me and MCQ's were not at all bad, section B had twisted questions( only some)while section C was OK but the last question for 4 marks was EPIC! I LOVED IT!

what did you write for the last question?

 

[Sara5396]

It was about Co2 production caused by man and due to natural causes. I wrote all about it cause I had it in my text book and I read it so it was the BEST question for me in the paper. <3