General Thoughts: Chemistry (1 Viewer)

[Magical Kebab]

two quick questions if anyone can help... Nothing to do with the exam...
in a galvanic cell, conventionally you put the anode on the left and cathode on the right.. Does it matter if it's the other way around?
Also, taking for example zinc and copper, the redox reaction here takes place by the zinc losing the electrons and forming ions if I'm right..what makes the zinc lose electrons in the first place anyway?

Thanks..

Anyone??

 

[someth1ng]

Anyone??

Post it in the right place but no, it doesn't matter.

 

[freeeeee]

Yeah, 299.2mg (4sf)

yep correct, i got the same, teacher said so to

 

[freeeeee]

Hg concentration was approx. 0.228...mg/kg, less than 0.5 therefore he could eat it

correct, i got the same, teacher said so to

 

[Kimyia]

haha I got the aspirin one wrong and only realised 2 seconds before they said pens down. Oh well, hopefully everything else was good
Anyone else thing the 6 marker on the battery/environmental impact/collaboration was a bit weird?

 

[xmichaelpham]

i got 2450 for K (industrial chem)
i got 299mg(average)
i got 0.228mg/kg and therefore less than 0.5 (safe to consume)

 

[someth1ng]

haha I got the aspirin one wrong and only realised 2 seconds before they said pens down. Oh well, hopefully everything else was good
Anyone else thing the 6 marker on the battery/environmental impact/collaboration was a bit weird?

Yeah, monitoring for battery damage was very strange...

 

[freeeeee]

i got 2450 for K (industrial chem)
i got 299mg(average)
i got 0.228mg/kg and therefore less than 0.5 (safe to consume)

correct

 

[Zeroes]

I stared at that equilibrium multiple choice question for about 5 minutes until I finally saw the third line. I am so blind.
Overall not bad but the fuck was that extended response?

 

[miss giggles]

For industrial Chemistry what did u guys put as the gas at P and Q in the electrolysis question

 

[freeeeee]

cant remember which one was p or q now, but the left one was chlorine gas, right one was hydrogen gas

 

[frontyardgrass]

it was pretty easy
think i might get a state rank
98+ raw mark
i even had time to do 3 other option questions, just for extra marks

 

[Varikan]

For industrial Chemistry what did u guys put as the gas at P and Q in the electrolysis question

at anode cl2 gas
cathod h2 + o2 gas

 

[MonsterMe]

it was pretty easy
think i might get a state rank
98+ raw mark
i even had time to do 3 other option questions, just for extra marks

Erm, I'm not quite sure it works like that...? Troll?

 

[traiwit]

What about the pH question ?
Did anyone get 2.397 something ?
I round it to 2.40 ==*
Feel like i got wrong answer

 

[kdizzler]

Hey, somehow I got 2450 for K, since the number of moles changed from 0 to 0.198 for Nitrogen, Hydrogen would have the same concentration since they are in equal amounts in the equation. Since that adds up to 0.396 there would have been 0.004 moles left of NO thus i got 0.198^2/0.004^2.

Dude don't stress you're right

 

[someth1ng]

What about the pH question ?
Did anyone get 2.397 something ?
I round it to 2.40 ==*
Feel like i got wrong answer

I think it was 1.30

 

[Madridismo]

What about the pH question ?
Did anyone get 2.397 something ?
I round it to 2.40 ==*
Feel like i got wrong answer

You did the same mistake as I did, we subbed in the moles of H+, not the concentration. The answer was 1.4

 

[traiwit]

I think it was 1.30

Oh okay, like i got 0.009 mole for HCl and 0.005 for NaOH
Then 0.004 left then ph equation

Oh damn im screwedddd X(

 

[traiwit]

You did the same mistake as I did, we subbed in the moles of H+, not the concentration. The answer was 1.4

Oh i got it now, thank !
How many mark will i get ? 1/3 ?