chlorine goes out as it is concentrated leaving OH ions behind and H ions go away leaving the Na and the NaOH is there at the cathode which goes blue/purple as it is basic.....
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sorry, it turns it scarlet, ans is D?but Cl2 bleaches litmus paper.. is it the same for universal indicator?
y is oh at anode? cl went ryt?chlorine goes out as it is concentrated leaving OH ions behind and H ions go away leaving the Na and the NaOH is there at the cathode which goes blue/purple as it is basic.....
yesacids are acidic due to the presence of H+ ions right?
and alkalines are basic because of the presence on OH- ions?
but wont that form like somewhere in the middle? why does the cathode change into purple/blue.. it only contains Na+ ions which while the anode has OH- ions.. :Schlorine goes out as it is concentrated leaving OH ions behind and H ions go away leaving the Na and the NaOH is there at the cathode which goes blue/purple as it is basic.....
y is oh at anode? cl went ryt?
nyc way 2 xplainyea CL went and its NaOH at cathode as the Na is at cathode and the OH moves towards the cathode to form NaOH which is basic.....my teacher just said metals are like nasty things who do not like to move and the OH ions float around towards these nasty things and form NaOH
C
you have to learn the test for anions and cations.. no other way!
sorry, not dat qn pprhttp://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w03_qp_1.pdf q21you have to learn the test for anions and cations.. no other way!
sorry again, not dat pprC
as when anything containing a nitrate ion is heated with sodium hydroxide and aluminium powder/foil , it forms ammonia gas which turns red litmus blue
The metal is Aluminium. Remember the test for nitrate and you'll see
the ppr is http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w03_qp_1.pdf, sorry the earlier 1 was by mistakeThe metal is Aluminium. Remember the test for nitrate and you'll see
nah, i know, but now im confused, see there was this question mj 07 , number 22c, they just want 2 c dat u notice solution, so solution will only b d case where d dissolved solute(s) is/r soluble. here comes d soluble/insoluble stuff. i hp u noe what salts r soluble n the rest which arent, if u dont tell
sry I was wrong
Look there is loads of hydrogen produced and since H2SO4 releases the most Hydrogen when electrolysed that is the answer
Cu SO4
H OH
There is only 1 H compared to S or O
Na Cl
H OH
There is only 1 H compared to the other which is either O or CL
H SO4
H OH
Notice there are 2 H's compared to the other gas which is 1 S
and we can see that the cathode has twice the more gas than the anode
I hope this helps and I hope I am not making a really stupid mistake
yeah, ms says Cnah, i know, but now im confused, see there was this question mj 07 , number 22
Aqueous lead(II)nitrate is added to a solution containing iodide ions.Lead(II) iodide is formed.
which type of reaction takes place?
A.Neutralisation
B.oxidation
C.percepitation
D.reduction
so is it C??
The answer is D as the PH "6" (acidic) cannot be formed by adding 2 alkaline solutions to each other!the ppr is http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w03_qp_1.pdf, sorry the earlier 1 was by mistake
so if u want 2 verify, do u do something like average d solun's added?The answer is D as the PH "6" (acidic) cannot be formed by adding 2 alkaline solutions to each other!
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