Chemistry and Physics some Keypoints/Notepoints (onDemandOnly) !! :)

[1357913579]

hmmm..thanks a lot!
That helped.... so, that discharge series i uploaded the photo of, does that only apply to graphite electrodes, or any electrode?

can u please tell me the CIE books number as iam not able to view ur uploaded pictures

 

[knowitall10]

sorry iam having some internet connection problems
see what ut saying regarding electrode potential is RIGHT but thats the other way using reactivity seires IAM sure about i mentioned that becuase u mentioned concentration becuase these are 2 ways we use to use when we were not introduced to using electrode potential

OOOOOOOOOOHHHHHHH!!!!
Ok ok...got it Thanks for the information! Allah Yajzeek!!

 

[knowitall10]

can u please tell me the CIE books number as iam not able to view ur uploaded pictures

I'm sorry even my internet's pissing me off :/
here u go

 

[Soldier313]

anyone knows how to calculate the percentage uncertainty? is there a formula or somethin ?

it's uncertainty/value x 100

eg if i am measuring 2.4 g on a mass balance with accuracy of 0.1 g
then uncertainty is
( 0.1/2.4 ) x 100
Hope that helped ....

 

[knowitall10]

it's uncertainty/value x 100

eg if i am measuring 2.4 g on a mass balance with accuracy of 0.1 g
then uncertainty is
( 0.1/2.4 ) x 100
Hope that helped ....

Yup! It helped me!!! Allah Yajzeeki!!!

 

[1357913579]

I'm sorry even my internet's pissing me off :/
here u goView attachment 25980View attachment 25981

in the book they have mostly mentioned platinum.

 

[knowitall10]

in the book they have mostly mentioned platinum.

Yes they have....but will that discharge series at the anode apply when using platinum electrodes?

 

[1357913579]

Yes they have....but will that discharge series at the anode apply when using platinum electrodes?

obviously it does but graphite is better to use because of its low cost

 

[1357913579]

OOOOOOOOOOHHHHHHH!!!!
Ok ok...got it Thanks for the information! Allah Yajzeek!!

and thanks alot for your Duas

 

[knowitall10]

obviously it does but graphite is better to use because of its low cost

Ooohhh...ok kk...hmm, Thanks a lot
Jazak Allahu Khair!!!

 

[knowitall10]

and thanks alot for your Duas

No prob
I'm never short of them

 

[xhizors]

What's the difference between relative uncertainty and uncertainty?

Relative is the one when you don't multipty the uncertainity by 100 as u did for % uncertainity!

 

[xhizors]

Yes they have....but will that discharge series at the anode apply when using platinum electrodes?

yes offcourse what discharge series have to do with electrodes(unless and untill electrodes themselves starts to give off some electrons)
also a keypoint
Platinium is used to increase the surface area on which oxidation reduction happen
mostly when u determining E* u use standard Hydrogen cell with platinium
and on the other hand electrode and electrolyte of the same metal/metal ions to form an equilibrium between metals and metals ions
hope it helps you a little

 

[lavanyamane]

Another question:
"Solubility product is the product of concentrations of each ion in a saturated solution of a sparingly soluble salt at 298K, raised to the power of their relative concentrations"
Can someone please explain this definition?

Yes, it means that if you have X2A3 = 2X- + 3A+, solubility product = [X-]^2[A+]^3

 

[knowitall10]

yes offcourse what discharge series have to do with electrodes(unless and untill electrodes themselves starts to give off some electrons)
also a keypoint
Platinium is used to increase the surface area on which oxidation reduction happen
mostly when u determining E* u use standard Hydrogen cell with platinium
and on the other hand electrode and electrolyte of the same metal/metal ions to form an equilibrium between metals and metals ions
hope it helps you a little

Yes, it means that if you have X2A3 = 2X- + 3A+, solubility product = [X-]^2[A+]^3

Thanks a lot! Jazakum Allahu Khair!
Al7amdulillah, i get it now...thanks alot

 

[Jiyad Ahsan]

http://alikhan3.hubpages.com/hub/A-Level-Physics-Formula-Sheet
all the formulas for as and a2 physics that you'll need.. thought this would help you guys out as you practice
i'm posting it on all the phy threads

 

[knowitall10]

http://alikhan3.hubpages.com/hub/A-Level-Physics-Formula-Sheet
all the formulas for as and a2 physics that you'll need.. thought this would help you guys out as you practice
i'm posting it on all the phy threads

Shabaaaassssssshhhhhhhhhh!!!!!!!

 

[Ariel Robert]

anyone knows how to calculate the percentage uncertainty? is there a formula or somethin ?

(Delta (Something)/Something) x 100

 

[Ariel Robert]

I knew that......................................ur a failed girl if u really acted like onee

You are a miss i dint even know tht, btw im using a friends account cuz she will use this account next year, so she wanted me make an account of her and get trophies and points for her she wants to become a XPFmoderator...

 

[knowitall10]

You are a miss i dint even know tht, btw im using a friends account cuz she will use this account next year, so she wanted me make an account of her and get trophies and points for her she wants to become a XPFmoderator...

Bro, i'm not a miss