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

[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...

Astaghfirullah...jk
I am a miss.......

 

[knowitall10]

Assalamu Alaykum
Can somebody please tell me what t-half=0.693/k used for? (It's related to half-lives..Chemistry, not the Physics half-life)

 

[iKhaled]

Assalamu Alaykum
Can somebody please tell me what t-half=0.693/k used for? (It's related to half-lives..Chemistry, not the Physics half-life)

its a formula we use to find out the constant (k) which we find in the rate equation..i dont think we must memorize this formula

 

[knowitall10]

xxfarhaxx here we are

 

[knowitall10]

its a formula we use to find out the constant (k) which we find in the rate equation..i dont think we must memorize this formula

Oh Alright, thanks brother
Allah Yajzeek inshAllah

 

[iKhaled]

Oh Alright, thanks brother
Allah Yajzeek inshAllah

pls pray for me i get great results

 

[knowitall10]

pls pray for me i get great results

inshAllah I'll remember you all in my prayers in fact
You guys are of great help
Jazakum Allahu Khair.

 

[iKhaled]

inshAllah I'll remember you all in my prayers in fact
You guys are of great help
Jazakum Allahu Khair.

thankss!!

 

[knowitall10]

thankss!!

No problem

 

[Ariel Robert]

Oh Alright, thanks brother
Allah Yajzeek inshAllah

What formaulaes? Kc, Kp and Ksp then there also PH(buffer)

 

[knowitall10]

What formaulaes? Kc, Kp and Ksp then there also PH(buffer)

Oh no, i had asked of what t-half=0.693/k was used for

 

[knowitall10]

OOOOOHHHHH MMMMMYYYYYYYYYY GGGGGOOOOOOOODDDDDDDDD!!!!!! (OMG I mean)
Guys, there are errors in our "new" chem book!!! Did you know that?! i hadn't
Follow this link and make sure u read everything written on it...Shoot! I didn't know this stuff at all
http://www.chemguide.co.uk/CIE/ciebook.html

 

[knowitall10]

i'm so scared now! I had to find this out only a week before my p4!!!

 

[lavanyamane]

i'm so scared now! I had to find this out only a week before my p4!!!

Don't worry, it's hardly anything! I know you are super panicky right now due to the stress, but don't be. That book is brilliant and just be grateful you found this errors page BEFORE the exam!

 

[seneria]

what is the difference between solubility and the solubility product?

 

[Ariel Robert]

what is the difference between solubility and the solubility product?

1g/100g of solubility of water...

 

[backtodev]

Hi guys - quick question, {physics} what do we need to know about Hall probes?
(my teacher forgot to teach the topic /sigh)
Judging from the past papers, it's usually just about the position of the probe in a magnetic field and some question about how voltage varies...what kind of questions would they also ask about hall probes?

 

[backtodev]

knowitall10
that electrode potential explanation you posted, you said "Remember when you had asked that question on P4 as to why when electrolysing some aq comp'ds you get one product that doesn't match the answer of the marking scheme?" ~ which past paper is this one question from?

 

[seneria]

1g/100g of solubility of water...

i didnt get you :/

 

[knowitall10]

knowitall10
that electrode potential explanation you posted, you said "Remember when you had asked that question on P4 as to why when electrolysing some aq comp'ds you get one product that doesn't match the answer of the marking scheme?" ~ which past paper is this one question from?

Ummm....I'm not very sure Brother....but what i do remember is that it was in my mock exam, and i got the whole thing wrong-which is why i was able to do it later on- i had discussed it with my teacher. But like i said in my post, it's a conceptual explanation. basically it has nothing to do with that question. you understand the topic and apply it to any question relating to electrode potentials and electrolysis
If u didn't understand it, please let me know