Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • Chlorine is used to purify drinking water Excess of chlorine is harmful The excess of chlorine is removed by treating with sulphur dioxide

8.23  Chlorine is used to purify drinking water, but excess chlorine is harmful. The excess of chlorine is removed by treating with sulphur dioxide. Present a balanced equation for this redox change taking place in water

Answers (1)

best_answer

Answer-

Base equation-  SO_{2}+Cl_{2}\rightarrow Cl^{-}+SO_{4}^{2-}--------------(have to remember)

Now we have to balance the oxidation half and reduction half.

oxidation half = SO_{2}\rightarrow SO_{4}^{2-}

Balance: Oxygen is balanced by adding water molecules; Hydrogen is balanced by H^{+} ion and for charge, add e^{-}(electron)SO_{2} +2H_{2}O\rightarrow SO_{4}^{2-}+4H^{+}+2e^{-}

Reduction half= Cl_{2}\rightarrow Cl^{-}

Balancing: to balance charge, add an electron   Cl_{2}+2e^{-}\rightarrow 2Cl^{-}

Now add both the balanced oxidation half and reduction half, and we get 

Cl_{2}+SO_{2}+2H_{2}O\rightarrow 2Cl^{-}+SO_{4}^{2-}+4H^{+}

Posted by

Gautam harsolia

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

PM Modi's Pariksha Pe Charcha 2025 to be held next month, registrations open till January 14
anam-khan

CBSE Board Exams 2025: Online portal for availing exemptions by CWSN students opens
anam-khan

Board Exams: States agree to equivalence; no question paper ‘jumbling’ from next year, says PARAKH CEO

Latest Question