Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
Use Coupon: CART20 and get 20% off on all online Study Material
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
A dry cell consists of a metal container in which a low moisture electrolyte paste covers the graphite rod or a metal electrode. Generally, the metal container will be zinc whose base acts as a negative electrode (anode) and a carbon road acts as a positive electrode (cathode). It is surrounded by manganese dioxide and low moisture electrolyte like ammonium chloride paste, which will produce a maximum of 1.5V of voltage, and they are not reversible.
.
The half cell reaction process has the following steps
Step 1:
During the process, a reduction reaction occurs within the moisturized electrolyte, which comprises manganese dioxide (MnO2) and ammonium chloride (NH4Cl) and graphite serves as solid support for the reduction reaction
2NH4+ + 2MnO2 →Mn2O3 + 2NH3 + H2O
Step 2:
Zinc container serves as an anode and undergoes an oxidation reaction
Zn → Zn2+ + 2e-
Zinc-carbon cell is the most common dry cell and is also called Leclanche cell. The alkaline battery has almost same half-cell reaction, where KOH or NaOH replaces the ammonium chloride and half-cell reactions are
ZNCl2 + 2NH3 → Zn(NH3)2Cl2
2MnO2 + H2 → Mn2O3 + H2O
The overall reaction is,
Zn + 2MnO2 + 2NH4Cl → Mn2O3 + Zn(NH3)2Cl2 + H2O
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !