MY CART (5)

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price:

There are no items in this cart.
Continue Shopping
                   

What is equivalent weight?explain with example.

3 years ago

Share

Answers : (1)

                                        

Dear Menka,


By definition one equivalent (or equivalent weight) of a substance is the amount of that substance which supplies or consumes one mol of reactive species. In acid-base chemistry the reactive species is the hydrogen ion (H1+) while in oxidation-reduction chemistry the reactive species is the electron. For example, in the following two reactions the equivalent weight of H2SO4 would be 49 grams or 0.5 mol in the first reaction but 98 grams or 1 mol in the second. On the other hand, sodium hydroxide has the same equivalent weight in both reactions, one mol or 40 grams.
(1) H2SO4 + 2NaOH ------> Na2SO4 + 2H2O
(2) H2SO4 + NaOH ------> NaHSO4 + H2O


In the first reaction one mol of H2SO4 supplies 2 mols of H1+ to NaOH, therefore, one-half mol of H2SO4 or 49 grams is one equivalent. The conditions are different in the second reaction because sulfuric acid only "looses" one hydrogen so the equivalent weight of sulfuric acid is one mol or 98 grams. However, sodium hydroxide behaves the same in both reactions, that is, one mol of sodium hydroxide always "consumes" one mol of H1+, so its equivalent weight remains the same at one mol or 40 grams.


Best Of luck


Plz Approve the answer...!!!!


Cracking IIT just got more exciting,It’s not just all about getting assistance from IITians, alongside Target Achievement and Rewards play an important role. ASKIITIANS has it all for you, wherein you get assistance only from IITians for your preparation and winexciting gifts by answering queries in the discussion forums. Reward points 5 + 15 for all those who upload their pic and download the ASKIITIANS Toolbar, just a simple click here to download the toolbar….
So start the brain storming…. become a leader with Elite Expert League ASKIITIANS


Thanks


Aman Bansal


Askiitian Expert

3 years ago

Post Your Answer

More Questions On Physical Chemistry

Ask Experts

Have any Question? Ask Experts
Post Question
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details
calculate the emf of the following cell at 298K H 2 +1/2O 2 =H 2 O delta G 0 = -226.8kj/mol H 2 O=H + +OH - delta G 0 = 76.2kj/mol
 
 
but the answer is 1.2 volts
 
ANIMESH one month ago
 
let us take the frst equation as equation 1 and second as equation 2 Now, add eq1+2 eq2 H2O + ½ O2 +H2 = 2H+ + 20H- Then delta G will b -226.8+2(76.2) -74.4kj/mol as delta G=-nFE E=-G/nF...
 
Neeraj Joshi one month ago
Which book can be useful for studying IIT physical chemistry?
 
 
You can find here list of good books. Apart from physical chemistry you will find help for other books. http://www.askiitians.com/important-books-iit-jee.aspx
  img
Harsh Patodia 3 days ago
 
Dr.P.bhadur’s numerical chemistry for good numericals with solutions.
 
Vignesh R 3 days ago
 
HC VERMA
 
Ch. Sai tejasri 3 days ago
in reactan side hcl is what and product is what
 
 
can you ask your question clearly
 
robo one month ago
 
can you ask your question clearly
 
robo one month ago
What is the configuration in [MnCl 6 ] - ? Plzz. show the at. orbitals too....
 
 
Charge on Mn in the complex = -3 –(-6) = +3 Electronic configuration Mn3+: [Ar] 3d4 4s0 4p0 4d0 Since, Cl- is a weak ligand, it will not cause pairing of 3d electrons in...
  img
Ramreddy 5 months ago
In cannizaro reaction, after the heterolytic cleavage of the pi bond due to the attack of the OH - ion at the carbonyl carbon, the pi bond is reformed and a H- ion leaves. Why is it more...
 
 
http://www.askiitians.com/revision-notes/chemistry/aldehydeketone-and-carboxylic-acid/ . Please go through this...
  img
Harishwar 5 months ago
 
I found out the answer. The OH- attacks the electrophillic carbonyl carbon and the pi bond of the carbonyl oxygen is broken and the electron moves to the oxygen. Since the medium is basic in...
 
Amogh 5 months ago
What is the easiest way of understanding schrodinger wave equation derivation …. coz my mathematical knowledge is very weak....
 
 
You don’t have to worry about the derivation if you are studying in 12 th class or below. But if you really want to understand properly, you should have a good knowledge of...
  img
Naveen Kumar 4 months ago
 
sir i m a graduating first year student...
 
Rashmi Rai 4 months ago
View all Questions »