echo ucfirst(strtolower($_SERVER['HTTP_HOST']));. acid accumulators
in Quality of an example we will consider ready to the use lead Accumulator. it consists of the trellised lead plates one of which are filled lead, and others - metal spongy lead. plates are shipped in 35-40 % solution h2so4; at this concentration specific a solution of sulfuric acid it is maximum.
Accumulator - at its category - in it oxidation-reduction reaction in which course metal lead is oxidised proceeds:
Pb+ SO4 = PbSO4 + 2e-
And lead it is restored:
Pb + SO4 + 4H++ 2e-= PbSO4 + 2H2O
elektrony given by atoms of metal lead at oxidation, are accepted by atoms of lead pbo2 at restoration; are transferred from one electrode to another on an external chain.
Accumulator By the anode also it is charged negatively, and pbo2 serves as the cathode and it is charged positively.
( H2SO4) Accumulator There is a carrying over of ions. ions so42 - to the anode, and ions h + - to the cathode. the direction of this movement is caused by the electric field resulting course of electrode processes: at the anode are spentand at the cathode -as a result the solution remains electroneutral.
Proceeding in lead Accumulator At its work (category):
Pb + PbO2 + 4H++ 2SO4 = 2PbSO4 + 2H2O
... charged lead Accumulator It is equal approximately 2. in process of category Accumulator Materials of its cathode (pbo2) and the anode (pb) are spent. sulfuric acid is spent also. thus pressure on clips Accumulator Falls. when it becomes less value supposed by service conditions, Accumulator Charge.
For gymnastics (or a charge) Accumulator To an external source of a current (plus to plus and a minus to a minus). thus the current proceeds through Accumulator A direction, the return to volume in which it passed at category Accumulator. as a result of it electrochemical processes on electrodes "address". on a lead electrode now there is a process of restoration
PbSO4 + 2e- = Pb+ SO4
PbSO4 + 2H2O = PbO2 + 4H++ 2e-
Hence this electrode is now the anode. ions in a solution in directions, return themes to which they moved at work Accumulator.
2PbSO4 + 2H2O = Pb + PbO2 + 4H++ 2SO4
easy to notice that this process is opposite to what proceeds at work Accumulator: at gymnastics Accumulator In it the substances necessary For it Of work again turn out.
Accumulator Connect in the battery which place in a monoblock from , a thermolayer, polypropylene, polystyrene, polyethylene, compositions, ceramics or glass.
Accumulator Service life or a resource-operating time (number of cycles) is. deterioration of parametres Accumulator and failure are caused first of all by corrosion of a lattice and sliding of active weight
Accumulator Is defined first of all by type of positive plates and service conditions.
Accumulator goes by the way of research of new alloys For lattices (for example svintsovo - ), the facilitated and strong materials of cases (for example, on the basis of a copolymer of propylene and ), improvements of quality of separators.