Chemistry: Post your doubts here!

[kitkat <3 :P]

Its Ok
Dnt Need to be SOrry !!
So only two Thats it.. On Na and other Cl?
By No Means u look a Bad Explainer .. !!

Actually Its like having a big cube which is divided and with one Na+u have to show 6 Cl- ions thats what our teacher said not sure

 

[Mohammed salik]

Hmm.. I kind Of Get !

 

[kitkat <3 :P]

Great ^_^

 

[Mohammed salik]

Great ^_^

Forgot to Thank U!

 

[kitkat <3 :P]

No problem

Forgot to Thank U!

 

[boxfire1995]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s07_qp_4.pdf

Can someone plx explain me q1b? Asap? JazakAllah in advance.

Please some, please explain this to me. Im confused with the terms aqueous concentrated and others

 

[Elena Gilbirt]

Can anyone plz give me any link for AS n A2 definitions for chemistry?plz

 

[abruzzi]

http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_s03_qp_4.pdf
Please pleaseee help me! I do not understand electrode potential well and exam is in a week
qn no. 1 (c)i - why is the polarity that way? Isn't the anode supposed to be the object to be plated since reduction takes place at the anode and therefore, it will gain the electrons from copper?
please help me understand it

 

[Suchal Riaz]

Snow Angel

Question number 4 b
As a secondary cation is more stable, the first reaction more often takes place.

 

[Suchal Riaz]

Snow Angel
u are not counting the optical isomer.

 

[_Ahmad]

Can anyone please help me with this question
calculate average bond energy of C-C bond in ethane given ΔHf(C2H6) = -85 KJ/mol , ΔHat(H)gas =218 KJ/mol and ΔHat(graphite) = 715 KJ/mol

 

[saadgujjar]

PLZ EXPLAIN IN DETAIL

 

[thats_me]

http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_s03_qp_4.pdf
Please pleaseee help me! I do not understand electrode potential well and exam is in a week
qn no. 1 (c)i - why is the polarity that way? Isn't the anode supposed to be the object to be plated since reduction takes place at the anode and therefore, it will gain the electrons from copper?
please help me understand it

At cathode always reduction takes place
At the anode always oxidation takes place
So the object to be plated is at the cathode & it will gain the electrons from copper
You can remember it this way if it helps:
CCR- Cathode cation reduction & RIG- reduction is gain
AAO- Anode anion oxidation & OIL- oxidation is loss

 

[Snow Angel]

Snow Angel
u are not counting the optical isomer.
View attachment 40898

thnx

 

[Snow Angel]

Snow Angel
View attachment 40897
Question number 4 b
As a secondary cation is more stable, the first reaction more often takes place.

thank u very much

 

[Snow Angel]

Basically because it has a week metallic bond. The mercury atoms doesn´t donate as much of their valence electrons to the cloud of electrons, so the electrostatic forces between the mercury cation and the delocalised sea of electrons isn´t as a strong metallic bond as say in magnesium, where there are more delocalised electrons and therefore more electrostatic forces of attraction.

oh thnx

 

[Snow Angel]

It's actually because there are relatively weaker electrostatic forces between its positive ions and its sea of electro s by Snowy Angel!!

ok thank u

 

[periyasamy]

You just saved my life!!!! *happy tears*

Haha.We always help each other,dont we...

 

[thats_me]

PLZ EXPLAIN IN DETAILView attachment 40903 View attachment 40904

 

[kitkat <3 :P]

How can we draw the reaction pathway for a reversible reaction :/