OCR A-Level Chemistry A June 2021 Paper 1 [Walkthrough and Tutorial]

[@thegamer3791]

You’re the Mr salles of biology. And if you know anything of Mr Salles, you’d know much much of a compliment this is

[@salami485]

Hi, i dont understand the answer for question 21 b ii at 1:12:24 . I dont understand what the actual mistake the student made was, are you not allowed to extrapolate to make an estimate?

[@theicedbryce8425]

look at the x-axis. if it started at 0 like it was supposed to, the y intercept would be smaller.

[@fatimav5984]

thank you so much for this !

[@eeshapatel1416]

for question 6 why is the concentration of Iodide 0.8?

[@raineysky]

There are 2 moles of iodide per mole of MgI2, so the concentration of iodide would be twice the concentration of MgI2

[@shush6183]

yo even i kinew ts gng lol u stoopid

[@Zeek000]

27:50 the wording of that question is disgusting, should've asked 'if it's difficult to predict which enthapy has greater effect' and not if it becomes less or more exothermic because clearly if two variables are less exothermic then overall it's less exothermic, ocr playing with us

[@xwntx_8578]

literally what i was thinking. scared of what shit they’re gonna pull tmrw

[@maeve5003]

Q14, the explanation for the 6 lone pairs is wrong, there is 1 lone pair on N, 2 on O and *3 on Cl*

[@maeve5003]

ik this because i thought there was just 3 (i missed the ones on Cl) and had to go find the explanation elsewhere

[@Definitely-Not-Kobeni]

yeah was thinking the same thing