Chemistry: Post your doubts here!

[Snowysangel]

strongest reducing agent will oxidise most quickly. in all of these ions on Cl- will ask as a reducing agent because:
2Cl(-1) --->CL2 +2e(-)
loss of electron is oxidasation
metal cations will gain electrons so they will reduce
as only Cl will be oxidised it will reduce other so it is strongest among these present options

And what if they had all been atoms? Would it be K, Ca, Al, Cl and Ar in terms of their strength as reducing agents? Basically if their next ionization energy is low they make good reducing agents right?

 

[Snowysangel]

Why are these two mechanisms energy demanding and difficult to carry out:
Converting diamond into graphite
Converting graphite into diamond
Suchal Riaz

 

[Suchal Riaz]

Why are these two mechanisms energy demanding and difficult to carry out:
Converting diamond into graphite
Converting graphite into diamond
Suchal Riaz

is this a past paper question?

 

[Suchal Riaz]

And what if they had all been atoms? Would it be K, Ca, Al, Cl and Ar in terms of their strength as reducing agents? Basically if their next ionization energy is low they make good reducing agents right?

to see which species is good reducing agent see how easily it can oxidise itself.
if it was metal then the metal with most highest ionisation energy would be strongest reducing agent. for example Na can reduce H in H2SO4.

 

[Snowysangel]

to see which species is good reducing agent see how easily it can oxidise itself.
if it was metal then the metal with most highest ionisation energy would be strongest reducing agent. for example Na can reduce H in H2SO4.

Doesnt Na have the lowest ionization energy? How do we know if something makes a good reducing agent, if not by lookibg st their ionization energy?

 

[Suchal Riaz]

Doesnt Na have the lowest ionization energy? How do we know if something makes a good reducing agent, if not by lookibg st their ionization energy?

i told you that a good reducing agent is the one which oxidises most easily. examples:
Cl- Fl- I-
in the above ions the general equation is
2Cl- -->Cl2 + 2e-
Cl- ion is more stable than I- but Fl- is more stable than Cl-. so strongest reducing agent is I-

Cl F I
none of these are reducing agents

Na Mg Al
equation when oxidised
Na --> Na+ + e-
This is the equation of ionisation. Na ionise more readily than Mg which is ionises more readily than Al
So Na is strongest

 

[Snowysangel]

i told you that a good reducing agent is the one which oxidises most easily. examples:
Cl- Fl- I-
in the above ions the general equation is
2Cl- -->Cl2 + 2e-
Cl- ion is more stable than I- but Fl- is more stable than Cl-. so strongest reducing agent is I-

Cl F I
none of these are oxidising agents

Na Mg Al
equation when oxidised
Na --> Na+ + e-
This is the equation of ionisation. Na ionise more readily than Mg which is ionises more readily than Al
So Na is strongest

Dude group 7 elements are oxidizing agents cause they're very easily reduced to their halides...the halides in turn are good reducing agents

 

[Suchal Riaz]

Dude group 7 elements are oxidizing agents cause they're very easily reduced to their halides...the halides in turn are good reducing agents

i meant to write 'none of them are reducing agent'

 

[Thought blocker]

https://www.xtremepapers.com/commun...sion-for-physics-and-chemistry-paper-1.33891/
Paper 1 PREPARING THINGS

 

[Snowysangel]

Suchal Riaz this one:
At a total pressure of 1 ATM, dinitrigen tetra oxide is 50% dissociated at a temperature of 60 degrees, according to the following equation:
N2O4 <---> 2NO2
What's the value if the equilibrium constant, Kp, for the reaction at 60 degrees?

 

[AnujaK]

https://sites.google.com/site/physicsfromatos/paper-3-revision
PHYSICS paper 3 notes! !

 

[raynalist]

Hiii.
plz can you help me to answer this question:
Explain in bond energy terms why the Haber process involves a high activation energy.

 

[Snowysangel]

Hiii.
plz can you help me to answer this question:
Explain in bond energy terms why the Haber process involves a high activation energy.

It involved the breakage of the triple nitrogen bond...hey is the process endothermic??

 

[Zain Javaid]

helped needed in the diagram .. please

 

[goodluckayesha]

View attachment 43334
helped needed in the diagram .. please

make a conical flask n label its capacity n place solid in it.... place a bunsen burner under it so the first step is complete
from the conical flask put a connecting tube into another conical flask with ice placed around the 2nd flask n both flasks shud have bung....2nd step complete
gas will be collected using 100cm3 gas syringe
Did u get it?

 

[Zain Javaid]

o s

make a conical flask n label its capacity n place solid in it.... place a bunsen burner under it so the first step is complete
from the conical flask put a connecting tube into another conical flask with ice placed around the 2nd flask n both flasks shud have bung....2nd step complete
gas will be collected using 100cm3 gas syringe
Did u get it?

ayesha miss we hav to liiquify gas . condenser wud b used

 

[goodluckayesha]

o s

ayesha miss we hav to liiquify gas . condenser wud b used

ok then wht will u do with ice eat it Mr Zaid

 

[roxylara]

Guys how should I prepare for the chemisyry MCQ's? Other then doing pastpapers, shall I go over the whole book 2 times At least?

 

[Zain Javaid]

ok then wht will u do with ice eat it Mr Zaid

ayesha i would rather prefer eating ice here its too hot already

 

[Zain Javaid]

by the way marking scheme also says lei dig condenser fills all the requirements here

ok then wht will u do with ice eat it Mr Zaid