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it was easy!
Till now I'm losing 15 marks and the number of mistakes is increasing every time I see this thread
How is every body saying that it was easy!!!!
same hereit was easy!
sooo easy we did blunders in the paper!
i don't wanna count the amount of marks i'm losing!
Guys who said you can't have more than 8 electrons, check the electron distributions on the Internet and he told u what is the number if electrons in the last shell so you can't just assume that it is 3 or 4 the answer is 11 and I'm very very sure
then both electrodes can workAgain,that question..The question was exactly like this
In both cases,electrolysis and cell,the cathode is where a REDCUTION reaction takes place and anode is where oxidation takes place.
In case of electrolysis,the anode is positive and cathode is negative.
The opposite occurs in a cell,where the more reactive metal loses electrons so it the negative pole and therefore ANODE.
Here there were no metals but the electrons flow was clearly shown,and the question stated
"Which electrode will be oxidized and decrease in mass"
Electrode B,Loses electrons ,dissolve in the solution as ions and its mass decreases(This actually ressembles electroplating where the ANODE loses electrons and change into ions.
While Electrode A,also decreases in mass but due to reaction with oxygen..This electrons compensate those lost in the reaction with oxygen which is A REDOX REACTION.
yes, one was A and the other was B!
hahaa..I drew 1 Cl on the 1st Carbon..1 Cl on the 2nd Carbon
CaCO3 in soluble and when CaO is added to water the reaction is highly exothermic produces alot of heat that may afeect fish activities
calcium oxide is soluble
CaCO3 is insoluble* IGCSE O/L student
Oxidation is loss of electrons and cathode gives electrons it's B
Fe2O3.2H2O
I think u will I wrote that and chlorination kills bacteraIn the water treatment question ( Unfortunately I have never studied this topic
If I wrote filtration to remove large obects than left in a tank to allow small particles to settle down .
Will I get 1 mark or non?
11
Answer this pleaseee
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