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Today's AQA CHEM 5/6...

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Reply 20

Barny

zazy

Aha did you get -164.something for qn 1 the enthlapy of sln?

Yeh

Reply 21

Resonance

Yeah I think I got -164 for /\Hsol

Reply 22

zazy

imasillynarb

Yeh

did you get 1.7 for the last part of the first qn section B? PH=1.7

Reply 23

Barny

What about the Elements of the period 3 Oxides?

I got: Na, P, Si

Anyone else?

Reply 24

Resonance

Yeah I got those elements.

Reply 25

zazy

imasillynarb

What about the Elements of the period 3 Oxides?

I got: Na, P, Si

Anyone else?

aha yeahhhhhhhhhhhhhh

Reply 26

Barny

Although I couldnt write an equation for Si's acidic properties or whatever

Reply 27

kingpong

imasillynarb

What about the Elements of the period 3 Oxides?

I got: Na, P, Si

Anyone else?

Yup. Acid = H3PO4

Reply 28

zazy

imasillynarb

Although I couldnt write an equation for Si's acidic properties or whatever

Is sio2 + 2OH- ---> sio3 2- +H2o correct???

Reply 29

Resonance

zazy

Is sio2 + 2OH- ---> sio3 2- +H2o correct???

I did that (well not an ionic equation but basically the same thing) and below it wrote acid + base ---> salt + water.

Reply 30

jay9386

is got SiO2 + 4H20 --> Si(Oh)4 + 2H+ + 2OH-

which shows its acidic i think

Reply 31

zazy

jay9386

is got SiO2 + 4H20 --> Si(Oh)4 + 2H+ + 2OH-

which shows its acidic i think

There are many ways to prove that anyway, what did you do with question 1?

Reply 32

zazy

There are many ways to prove that anyway, what did you do with question 1?

How many peaks did you all get for the nmr of butanedioc acid?

Reply 33

jay9386

ne1 write down the answers i wrote um for first 20 odd

abacbddbadbadccbbabdbaadab

Reply 34

kingpong

zazy

How many peaks did you all get for the nmr of butanedioc acid?

Reply 35

kingpong

jay9386

ne1 write down the answers i wrote um for first 20 odd

abacbddbadbadccbbabdbaadab

I made a thread on that, add your results there.

http://www.uk-learning.net/t51623.html

Reply 36

Sapphira

i got Na and Si, but really cant remember the middle one!! WHat did it ask?! :tongue:

Reply 37

babylon

kingpong

Crapola, I got 2.2 ish moles.

me too actually, lol

Reply 38

babylon

Resonance

That question about What Kind of acidity is this? (referring to FeCl3) was great.

i got confused with the acidity thing......i mean what sorts of aciditys r there?! :confused:

Reply 39

Sapphira

lewis/bronsted lowry i think

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Today's AQA CHEM 5/6...

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