Ocr f321 23 may 2013~official discussion thread

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Reply 220

Freddy-Francis

Original post by Rida94

Anyone know the bond angle and shape of H2O2?

It is non-linear and 104.5 deg

Reply 221

Rida94

Original post by Daniel__

If your referring to the bond angle of H-O-O then it Should be 104.5, as it consists of 2bp and 2lp in both cases. Try sketching the molecule out, it should help.

Yess sorry thats what i was referring to. Ah thank you, I sketched it out and got non linear. 104.5 degrees, just wanted to confirm lol

Reply 222

Moon1ight

I think,not to dampen the spirits,tomorrows exam is going to be solid.OCR made hard maths,biology an chemistry papers for 2013 and whether you think they weren't hard or not,OCR have changed the whole layout this year and put tricks in.Be careful,Good luck and let's hope the resisters like me improve and the first timers go and do themsleves happy :smile:

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Reply 223

Rida94

Original post by Freddy-Francis

It is non-linear and 104.5 deg

Thank you!

Reply 224

Daniel__

Original post by Rida94

Yess sorry thats what i was referring to. Ah thank you, I sketched it out and got non linear. 104.5 degrees, just wanted to confirm lol

No problem.

Reply 225

Legal drugdealer

Original post by narli

here you go

Thank you

Reply 226

yodawg321

Original post by krishkmistry

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Physics was hard this year too :/ Really hope the paper isn't going to be bad tomorrow

Reply 227

Freddy-Francis

My first Past paper try got a D :frown:

Next one here i come

Reply 228

Shanze S

volatility is confusing me ?

Reply 229

SchoolKid.

Original post by Shanze S

volatility is confusing me ?

I'm pretty sure we dont need to know that for unit 1. Volatility is is unit 2.

Reply 230

Shanze S

Original post by SchoolKid.

I'm pretty sure we dont need to know that for unit 1. Volatility is is unit 2.

But i saw a question on one of the past papers stating : Explain the trend in volatilities of the halogens chlorine,bromine and iodine ? -

Reply 231

scorpio22

i cant seem to pass. anyone got any predictions?

Reply 232

yodawg321

Original post by Shanze S

But i saw a question on one of the past papers stating : Explain the trend in volatilities of the halogens chlorine,bromine and iodine ? -

That's unit 2 about alcohols?

Reply 233

Shanze S

Original post by yodawg321

That's unit 2 about alcohols?

, no it wasn't ,its like part two of a two part question. The first part being how VDW are formed. I dont know , but i seem to have written next to it as the answer about increase in electrons so increase in VDW but cant remember why so

But i have not seen it again on a past paper, so i guess it was a fluke or something

Reply 234

SchoolKid.

Original post by Shanze S

But i saw a question on one of the past papers stating : Explain the trend in volatilities of the halogens chlorine,bromine and iodine ? -

I think I did that question and I'm almost certain it was from a unit 2 paper.

Original post by scorpio22

i cant seem to pass. anyone got any predictions?

Keep on doing past paper questions and always ready the question properly.

Reply 235

joshturnbull123

Original post by Shanze S

But i saw a question on one of the past papers stating : Explain the trend in volatilities of the halogens chlorine,bromine and iodine ? -

All you'd have to talk about is how volatility decreases down the group because strength of VDW's increases (due to increasing no. of electrons etc)

Reply 236

yodawg321

Original post by scorpio22

i cant seem to pass. anyone got any predictions?

Original post by Freddy-Francis

My first Past paper try got a D :frown:

Next one here i come

Why do you guys start past papers a day before? :O

Reply 237

Shanze S

Original post by joshturnbull123

All you'd have to talk about is how volatility decreases down the group because strength of VDW's increases (due to increasing no. of electrons etc)

Yeh that makes sense , thanks

Reply 238

A-New-Start

Finally finished all the 7 past papers, i got 56,58,57,56,56 in the last five.

Tomm. exam -> 45 -_- but i think revision is over now. movie TIME....!

Reply 239

yodawg321

Original post by A-New-Start

Finally finished all the 7 past papers, i got 56,58,57,56,56 in the last five.

Tomm. exam -> 45 -_- but i think revision is over now. movie TIME....!