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Edexcel IAL, Unit 5: Transition Metals and Organic Nitrogen Chemistry. 22-Jun-2016

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What were the answers to the Hess's law and the titration question?

I don't think boundaries will be that high - I'd say 75 for the A* and 65 for an A is fair.

Reply 261

Geethan

Original post by RizK

Paper eka lesi eth kela wela inne huttho :frown:

ade bro moko kela? FP3? lesi nam what the scene?

Reply 262

Ayman!

Guys, keep it in English :smile:

That's the forum rules (otherwise provide a translation!)

Reply 263

nimesh007

Original post by Ayman!

What were the answers to the Hess's law and the titration question?

I don't think boundaries will be that high - I'd say 75 for the A* and 65 for an A is fair.

i got -1.9 ur sayng enthalpy chnge from diamond to graphite thing right

Reply 264

babiiii

What was the enthalpy level diagram ? how did u all draw it.

Reply 265

Ayman!

Original post by nimesh007

i got -1.9 ur sayng enthalpy chnge from diamond to graphite thing right

Yeah! Most of my friends got an endothermic answer but it couldn't have been +ve.

What were your masses?

Reply 266

nimesh007

Original post by Ayman!

Yeah! Most of my friends got an endothermic answer but it couldn't have been +ve.

What were your masses?

1.83 n 1.98, did u got enthalpy change as -1.9

Reply 267

Ayman!

Original post by nimesh007

1.83 n 1.98, did u got enthalpy change as -1.9

Yeah, that's what I got too

A few people subtracted moles but idk why you'd need to do that since all the Fe²⁺reacted the first time round and in the second titration all the remaining Fe³⁺was converted to Fe²⁺and titrated as normal