|
|
|
| |
Advertisment
|
| |
Wikipedia
Sir Li Ka Shing, GBM, KBE (, Jyutping: Lei5 Gaa1-sing4, Li2 Gia1-sêng5 gdr, born July 29, 1928), is one of the most famous businessmen in the world for his wealth and his business acumen. He is the richest person of Chinese descent in the world, the...
http://en.wikipedia.org/wiki/Li_Ka_Shing
|
| |
Links
|
|
|
|
|
| |
Downloads
|
| |
Definition
|
| |
Questions & Answers
How is percent dissociation of an acid related to the Ka value for the acid?
How is percent dissociation of an acid related to the Ka value for the acid (assuming equal initial concentrations of acids)?
Percent dissociation = amount ionized/ original amount times 100
The Ka is used to find [H+] (if its given to you) and the H+ is your "x" or your amount ionized.
The original amount is the initial concentration of the acid.
How to calculate Ka for an reaction using pKas?
Acetone reacts with potassium tert-butoxide to form an enolate and t-butanol. Given the pKa of acetone is 19 and the pka of t-butanol is 18, calculate the equilibrium constant.
What is the difference between Ka and just K as well?
Thanks.
Pka= -log (Ka)
Ka= 10 raised the the negative power of the pka
= 10 ^ (-pka)
So just plug and chug
Ka= equilibrium constant of an acid
K= equilibrium constant
How to design the short circuit current (kA) in the electrical circuits?
For example in a factory the main power panel's kA is 50 and the others are getting down by 36,25,16 and 10 kA.
What i want to know is , is there any specification/formula behind this calculation.
If so please answer me.
All of this is determined by a short circuit and co-ordination study. The fault current at the supply point is obtained from the supply company and they are legally obliged to provide it. Other contributions may come from the factory equipment especially if there is a large motor load.
Transformers and cables etc introduce impedance and resistances into the circuits so the fault level varies throughout the system.
Everything is put into a computer model such as http://www.skm.com/index.shtml
|
|
