Chemistry Predictions/Thoughts (3 Viewers)

[almost_done]

For q19 I got C
And 20 I got b

Are those right?

thats what i got for 20

 

[iane]

it didn’t same to name no? It just said to determine the structure

if we just drew it is that ok?

 

[almost_done]

it didn’t same to name no? It just said to determine the structure

yeah it just said determine structure... so i just drew it. oh well

 

[hm...mmmm]

Do you think alignment will be better this year because exam was harder than 2024? Also for last question I didn't write the name of structure is that bad? Silly mistake

 

[Wildhalberd]

I thought the exam was easier than 24?

 

[Wildhalberd]

Do you think alignment will be better this year because exam was harder than 2024? Also for last question I didn't write the name of structure is that bad? Silly mistake

Last Q usually marked at Band 6 level so you'll lose one mark if you got everything else correct

 

[Trial&Error]

What was ka of acid in the titration curve question? And why did ph of naoh 0.1 mol/l never reach 13

For a weak acid u look at the 1/2 equivalence point where pH=pKa, then solve for Ka
Because for 13pH to happen the conc of OH- has to be 0.1mol/L which can’t occur since some of the OH- is neutralised by the H+ from the weak acid.

 

[nowomansland]

bro where were we taught this with hsc resources and syllabus?

true i def wasn’t taught that either but i saw it in a bunch of past papers which is why i knew abt it

 

[Trial&Error]

Question. For the titration question I got 86.7% which didn’t align with anything, and I double checked and there was no rounding errors either. so I put X and said after accounting for rounding and titration inaccuracies, it’s closest to 85.5%. Is that okay do you guys think?

 

[Starship22]

for the Ka x Kb question, I accidentally did N2H4 + H2O —> OH- + N2H5+ so I got POH as like 4.46. How many marks would I lose for this

 

[tywebb]

better version of paper attached. this one is in order

 

[nowomansland]

wait for the last q we won’t lost marks if we didn’t name the structure right

 

[anonymoushehe]

Question. For the titration question I got 86.7% which didn’t align with anything, and I double checked and there was no rounding errors either. so I put X and said after accounting for rounding and titration inaccuracies, it’s closest to 85.5%. Is that okay do you guys think?

bro I think me too my percentage was slightly above but I didn’t round in my calculations until end

 

[t234]

For q19 I got C
And 20 I got b

Are those right?

I got C for 19 my friend did too

 

[nowomansland]

Question. For the titration question I got 86.7% which didn’t align with anything, and I double checked and there was no rounding errors either. so I put X and said after accounting for rounding and titration inaccuracies, it’s closest to 85.5%. Is that okay do you guys think?

yeah thats fine i also got 85.7% but i don’t think we had to justify it i just said it was closest to brand X

 

[anonymoushehe]

Also how did u guys do the precipitation one? Like which one forms a ppt

 

[t234]

i kinda got 85.7% but fudged it and made it 85.5%
why did i do that AAHHHH

 

[HappyTheSkibidi]

I got C for 19 my friend did too

How did you get C for 19?

 

[nowomansland]

Also how did u guys do the precipitation one? Like which one forms a ppt

i said both will ppt but i don’t think thats right LOL

 

[t234]

How did you get C for 19?

ngl i did that in the start i completely forgot and i’m like lowkey out of it rn so i don’t remember