http://www.xtremepapers.com/papers/...l O Level/Chemistry (5070)/5070_s11_qp_21.pdf
Can anybody explain A3 b iv)
Can anybody explain A3 b iv)
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heyy guys for chem is aluminium extraction (all with the cryolite stuff) is it included in the syllabus for 2012? if yes then plz give me some notes on it if u have any thanks
No i said question 3 part b iv)what about it ? you just need to type the definition.
Reduction: The removal of oxygen, the gain of hydrogenm, the addition of electrons or a decrease in oxidation state.
The mass of uranium one ?what about it ? you just need to type the definition.
Reduction: The removal of oxygen, the gain of hydrogenm, the addition of electrons or a decrease in oxidation state.
The mass of uranium one ?
compared to aluminium iron is a less reactive metal only those metals can be extracted from electrolysis who are high in the reactivity series and iron is extracted from its ore using carbon as a reducing agentCan anyone please answer this....explain why aluminium is extracted by electrolysis whereas iron is not
Can anyone please answer this....explain why aluminium is extracted by electrolysis whereas iron is not
The oxide of Aluminium is very stable therefore it can only be extracted by electrolysis,while iron which is lower in reactivity series is extracted with the help of a reducing agent-either carbon or hydrogen.Can anyone please answer this....explain why aluminium is extracted by electrolysis whereas iron is not
Help please ?http://www.xtremepapers.com/papers/...l O Level/Chemistry (5070)/5070_s11_qp_21.pdf
Can anybody explain A3 b iv)
Help please ?
my mass is coming 881,310 grams (0.881 Tonnes) .. is it even close to the right answer?
Was a really tough question ! needed some thinking
what is your equation of step 2?Help please ?
what is your equation of step 2?
0.881 is the answer !!I answered it above .. you didn't reply
Hw did u get it ..??I answered it above .. you didn't reply
Hw did u get it ..??
thats correct,approximately.First get the number of moles for U02 .. Mr of U02= 270g .. 1 tonnes = 1million g
Moles of U02=1million/270 = 3703.
1 Mole of U02 produces 1 mole of U .. check the equations .. that's how i got it.
therefore 3703 produces 3703.
Mass of U= Moles*Mr
= 3703*238
= 881,481 grams (divide it by 1 million to get the answer in tonnes)
U have the equation of step 1 it shows that 1 mol of UO2 gives 1 mole of UF4 so calculate the mass of 1 mol of U02 mr is 270 multiply it with 1 so 1 mole is 270 g now notice in step 2 1 mole of UF4 gives 1 mol of uranium that means 270g of UO2 gives 238g of uranium now 1 tonne has 1milliong calculate the number of moles of 1 tonne of UO2 they come 3704 as ratio is 1:1 calculate the mass of 3704 of u it comes as 881552g now divide this by 1 million ans is 0.88Hw did u get it ..??
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