Chemistry 1C , 2C

[schoolation]

It was good for me but i think i did some silly mistakes:S
Am hoping to get A* because i worked really hard:S
I pray to all of you guys to get the grades you are hoping

When talking about silly mistakes, I should say What I really did..
In the question asking about the acid forms when SO2 reacts with rain, I wrote, Sulfurous Acid, H2SO3!!!!!

But however, I have a question, in the molar enthalpy change, it was 48, but in the AS chemistry ( Oh by the way, I did AS chemistry as well )
We should indicate the sign, so I wrote , because their is heat given off, the reaction is exothermic, so the molar enthalpy change should be with negative sign. Therefore, the molar enthalpy change = -48 kJ/mol
Is that right with the O level?

 

[mennakhaled]

When talking about silly mistakes, I should say What I really did..
In the question asking about the acid forms when SO2 reacts with rain, I wrote, Sulfurous Acid, H2SO3!!!!!

But however, I have a question, in the molar enthalpy change, it was 48, but in the AS chemistry ( Oh by the way, I did AS chemistry as well )
We should indicate the sign, so I wrote , because their is heat given off, the reaction is exothermic, so the molar enthalpy change should be with negative sign. Therefore, the molar enthalpy change = -48 kJ/mol
Is that right with the O level?

you did it right! goood
i did wrong:S
and the question about farady too !
and the half equation am not sure of it
i think i was dying while i was doing the exam :S!!

 

[schoolation]

The faraday question was pretty easy, what was wrong with it?

 

[mennakhaled]

i dunno what happened with me during the exam:s
maybe it was easy but i couldn't solve many stuff
can you tell me the answers of faraday pls

 

[schoolation]

It was 444.7 or 447.4 I can't remember exactly, but there were two fours in the story

 

[alex]

It was 444.7 or 447.4 I can't remember exactly, but there were two fours in the story

yeee i remember that too.

also what's the acid formed when SO2 reacts with rain? H2SO3?

 

[mennakhaled]

sulfurus acid

 

[alex]

sulfurus acid

ohh lord i got it right!

 

[mennakhaled]

dou they pass the little spelling mistakes:S?

 

[alex]

i think they'll accept sulfurus instead of sulfurous.

 

[mennakhaled]

yeah i wrote it sulfurous at the beginning but i changed it stupid me-.-
i hope to be accepted!

 

[schoolation]

Wait wait , Isn't it SULFURIC ACID?
Sulphurous acid doesn't cause acid rain, because it is an unstable acid which reacts with water REVERSIBLY!
I wrote Sulphurous too, but I think that the right answer is Sulphuric

 

[mennakhaled]

i think the question was direct what happens when sulfur dioxide reacts with water how it could be sulphuric!!!!

 

[schoolation]

The question was
What is the acid formed when SO2 reacts with rain to form ACID RAIN!

 

[alex]

The question was
What is the acid formed when SO2 reacts with rain to form ACID RAIN!

well if that was the question,, then it must be sulfuric

 

[Madridista]

sulfuric acid

 

[schoolation]

What makes me really upset, is that I KNOW THE ANSWER, but I was acting like smarter than the examiner, and I misunderstood the meaning! So I wrote sulfurous

 

[mennakhaled]

It's not a big deal am lost 6 or 8 marks in this paper lol!

 

[schoolation]

I hope that we get generous marking! We all worked hard and deserve an A* without even entering the exam

 

[mennakhaled]

I hope that we get generous marking! We all worked hard and deserve an A* without even entering the exam

If i didn't get A* i wouldn't study again LOL!