Why does charging lead acid battery give off hydrogen sulfide gas?
When a lead-acid battery is discharged, the electrolyte (sulfuric acid) and the active material on the plates of the battery (lead) are consumed to produce water and lead sulfate and current flow. The chemical equation for a lead-acid battery during discharge is: PbO2 Pb 2H2SO4 -->PbSO4 2H2O +Electrical energy. The chemical equation for a lead-acid battery during charge is the reverse with lead, sulfuric acid, and heat being yielded as well as some Hydrogen gas. Ideally, all of the lead sulfate is recombined with the hydrogen from the water to replenish the sulfuric acid. When a lead-acid battery is charged, electrical energy is added to the battery, causing the water and lead sulfate to be recombined to produce electrolyte and the active plate material. During normal charging, hydrogen gas is given off, however if internal damage to the plates or low electrolyte levels exist, internal gassing may create hydrogen sulfide gas. In sealed batteries this would normally not vent to the outside.
5 people found this useful
I think the answer is HS-1. This is written out in plain English (non-scientific terms) is HS Negative One. It may also be written as HS-
Battert Gases Vented . Generally, automotive batteries discharge Hydrogen Gas during both the charging and discharge cycles.
NO, it is a very weak acid.
it is a problem hydrogen sulfide gas is poisonous and should not be inhaled and should be avoided as much as possible
H2S is not likely to erode the plastic, but the acid from inside the battery definitely could.
no -it is diprotic
It will more than likely explode. You charge the battery with a charger that coverts 120V AC to 12V DC.
Yes, well maybe. Not sure on jell cells. When you run current threw water though there is electrolysis and it splits into O2 and H2.
Charge them with a 6 volt battery charger.
The basic lead acid battery is ancient and a lot of different charge methods have been used. But one way is to charge these batteries at a float voltalge of 2.25 to 2.3 volts/…cell (at 25 degrees C) (13.5V to 13.8V for a 12V battery).