0

Guest

Courses New

What is the equivalent weight of sulphur in S~(S2O3)2- +(S)2- ~ means arrow

What is the equivalent weight of sulphur in 
S~(S2O3)2-  +(S)2-
 
 
~ means arrow

Grade:12

2 Answers

Suraj Prasad IIT Patna
askIITians Faculty 286 Points
9 years ago
The equivalent weight is the gram molecular weight divided by the number of electrons lost or gained by each molecule; e.g., potassium permanganate (KMnO4) in acid solution, 158.038/5 g; potassium dichromate (K2Cr2O7), 294.192/6 g; and sodium thiosulfate (Na2S2O3·5H2O), 248.1828/1 g.
In case of Sodium Thiosulfate the reation proceeds as under:


I2 + 2 Na2S2O3 → Na2S4O6 + 2 NaI


2 Na2S2O3 ≡ I2 ≡ Cl2 ≡ 2 e
Hence Na2S2O3 ≡ 1 e
Thus Molecular weight devded by 1 is the equivalent weight & hence both have same value
Yash Chourasiya
askIITians Faculty 256 Points
3 years ago
Dear Student

The equivalent weight is the gram molecular weight divided by the number of electrons lost or gained by each molecule
e.g., potassium permanganate (KMnO4) in acid solution, 158.038/5 g;
potassium dichromate (K2Cr2O7), 294.192/6 g;
and sodium thiosulfate (Na2S2O3·5H2O), 248.1828/1 g.
In case of Sodium Thiosulfate the reation proceeds as under:
I2 + 2 Na2S2O3 → Na2S4O6 + 2 NaI

2 Na2S2O3 ≡ I2 ≡ Cl2 ≡ 2 e
Hence Na2S2O3 ≡ 1 e
Thus Molecular weight divded by 1 is the equivalent weight & hence both have same value.

I hope this answer will help you.
Thanks & Regards
Yash Chourasiya

Think You Can Provide A Better Answer ?

Other Related Questions on Physical Chemistry

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More