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http://papers.xtremepapers.com/CIE/...l O Level/Chemistry (5070)/5070_s11_qp_42.pdf
QUESTION 8 Part I. The last part, anyone?
QUESTION 8 Part I. The last part, anyone?
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Ion with more concentration will get discharged. Simple rule. Applies to Cations and Anions. But our teacher told us only Cl,Br,I.In 2,b,ii) how are we supposed to know that iodine is preferentially discharged?Isnt the only one chlorine in our syllabus that can be discharged in stead of oxygen??
Oh LOL! I posted the wrong question. -_-Q8 A
Guys please tell how to solve these type of question.
26. An aqueous solution of compound X reacts with aqueous sodium hydroxide to form a green precipitate and then aluminium powder is added. The mixture is heated a gas that turns damp red limtus paper blue is given off?
What is X?
A. ammonium nitrate
B. copper (II) cholride
C. iron(II) nitrate
D. iron (III) cholride
I know the answer, i checked it. But how do we get it?First one is test for Fe+2 ion and the second is test for nitrate ion. So you join the 2 together and answer is C.
Page 29, Qualitative Analysis Notes:I know the answer, i checked it. But how do we get it?
Page 29, Qualitative Analysis Notes:
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Chemistry (5070)/5070_y14_sy.pdf
But it was a part of MCQs paper?
These tests only. CIE says you must know these by heart for Paper 1,2,4And are these all the tests that should be learned? or any more?
Thank you very much for you help. And is desalination still a part of new syllabus?These tests only. CIE says you must know these by heart for Paper 1,2,4
Yes you can.Can we write that the blue solution fades in the observations for the reaction b/w Zn and copper II sulfate ?
This is an oft-repeated q and its observations include:Can we write that the blue solution fades in the observations for the reaction b/w Zn and copper II sulfate ?
Q4.[/quot
Calculate the moles of sodium hydroxide and then in each part see which one equals to the moles of Naoh
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