Recent content by rainbowspoon1

whats the answer? i got 0.62L (2.s.f) but i feel like i did it wrong

oops the person who got 0.53 is correct, i didnt include the h20 in the molar mass

I got D, 100g + 14g = 114g, divide by 1.060, you get 107.54 which is the volume of the solution. c = n/v, n = 14/120.366, v = 0.10754. therefore c = 1.08 M (3.S.F)

just c! addition of h20 favours the reverse reaction and therefore makes it more pinl

you gotta have some level of discussion about techniques bc its how the composer chose to convey their perspective, but i think the focus is critical analysis of the meaning of the text in relation to the question, more so than like TEA in advanced . mention techniques tho !!!

so u work out the [h+] for both solutions. for number 1, u hav 0.25 of H2SO4, so therefore 0.5 mols of h+ as its diprotic. Or so you think!!! H2SO4 ionizes in two stages, the first is h2s04 -> hso4- + h+, which happens 100% of the time (i.e h2so4 is a strong acid), but the ionisation of hso4 is...

oops it is C, a is 0.0025 i forgot a decimal. silly!!!! but deltah for water is 57kj of heat realeased per mol, and one mol of water requires 1 mol of h+ and oh-, so more mols formed = more temp change :)

im p sure its a, you can eliminate b bc ch2cooh is a weak acid, and then u look at the mols that react, c has 0.02 mols of water formed, d has 0.005, a has 0.025 therefore the heat of combustion is highest for a

thats cray i thought the whole point of the module was literary theory lmao

yeah? arent we meant to

are solutions out yet?

i got c bc if u draw it and then draw the inv function it looks like it crosses x = 1 3 times. for the last one i guessed c or d i dont remember

i feel like 2022 wasnt that rough outside of the proj motion and the flights question while this like consistently sucked from the last part of q12

i think that was like the hardest maths ext 1 paper ive ever done... managed to get 60-65+ on like all the trials/past papers and i think id be lucky to scrape a pass

haha i tried using series. i would skip this in an exam i feel like the point at which u even get 1 mark is so much work