Homework Help
Homework Help
View Details
Assignment Help
Assignment Help
View Details
Online Tutoring
Online Tutoring
View Details
Secondary Cells
This type of cells can be recharged by passing direct current through them and can be used again and again. Some examples are lead-storage battery, nickel, cadmium storage cell, etc. let us study the working of lead storage cell.

Lead storage battery: it is the most frequently used battery in automobiles. It consists of six voltaic cells connected in series. In each cell anode is made of spongy lead and cathode is a grid of lead packed with lead dioxide (pBO2). The electrolyte is the aqueous solution of H2SO4 which is 38% by mass. The reactions taking place this type can be represented as:



During the working of the cell, the concentration of H2SO4, decreases as sulphate ions are consumed to from PbSO4. The PbSO4 precipitates and partially gets coated on both the electrodes and water formed dilutes the sulphuric acid. With the decrease in the concentration of H2SO4 the density of the solution also decreases. The condition of the battery can be easily checked by measuring the density of the solution.

To enhance the output of the cell, the anode and cathode plates are arranged in alternating manner and they are separated by sheets insulating material. The anode and cathode plates are separately connected to each other so as to increase the electrode area in contact with electrolyte solution. This increases current delivering capacity of the cell. The cells are further connected in series so as to increase the voltage of the battery. In 6 volts battery there are 3 cells and in 12 volts battery there are 6 cells.

Recharging the battery: the battery can be recharge by connecting it to an eternal source of direct current with voltage greater than 12 V. it forces to electrons to flow in opposite directions resulting in the deposition of Pb on the anode and PbO2 on the anode and PbO2 on the cathode.

During the recharging operation the cell behaves as electrolytic cell. The recharging reactions are:



Services:- Secondary Cells Homework | Secondary Cells Homework Help | Secondary Cells Homework Help Services | Live Secondary Cells Homework Help | Secondary Cells Homework Tutors | Online Secondary Cells Homework Help | Secondary Cells Tutors | Online Secondary Cells Tutors | Secondary Cells Homework Services | Secondary Cells


Submit Your Query ???
Topics
Activation Energy Average Rate Determination Rate Equation Value Reactions Collision Theory Reactions Temperature Effect Half Life Of Reaction Integrated Rate Equation Rate Equation Expression Reaction Mechanism Pseudo First Order Reaction Rate Equation Law Chemical Reaction Rate Additional Compounds Co-ordination Compounds Coordination Compounds Bonding Coordination Compounds Colors Octahedral Complex Splitting Tetrahedral Complex Splitting Stabilization Energy Crystal Field Theory Stability Affecting Factors Isomerism In Compounds Magnetic Properties Metal Carbonyls D-orbitals Orientation Mononuclear Compounds Naming Coordination Compounds Stability Terminology Compounds Werner Theory First Row Transition Elements Elements Electric Configuration F-block Elements Halides And Sulphides Metals-Oxides, Oxoanions Potassium Dichromate Potassium Permanganate The Actinoids The Lanthanoids Cell Potential Concentration Cells Electrolytic Solution Conductance Corrosion Gibbs Energy Electrochemical Series Rusting Electrochemical Theory Electrode Potential Electrolytic Cells Fuel Cells Galvanic Cells Electrode Potential Measurement Nerst Equation Corrosion Prevention Primary Cells Redox Reactions Salt Bridge Secondary Cells Standard Hydrogen Electrode Electrodes Types Steel Production Process Metals Extraction Metallurgy Principles Conduction In Insulators Conduction In Metals Density Of Unit Cell Solids-Electrical Properties Solids-Magnetic Properties Non Stoichiometric Defects Stoichiometric Defects Azeotropes Solutions-Colligative Properties Degree Of Association Degree Of Dissociation Depression In Freezing Point Elevation In Boiling Point Henry Law Constant Ideal Solutions Isotonic, Hypotonic Solutions Osmotic Pressure-Molar Mass Non Ideal Solutions Osmosis Solid In Liquid Solution Vapour Pressure Lowering Solubility Of Gases Solids In Liquids Solubility Types Of Solutions Liquid Solutions Pressure Adsorption Adsorption-Gases On Solids Adsorption From Solution Adsorption Applications Catalysis Chemical Adsorption Colloidal Solutions Coagulation Colloidal State Adsorption, Absorption Difference Emulsions Enzyme Catalysis Gels Heterogeneous Catalysis Homogeneous Catalysis Physical Adsorption Colloidal Solution Purification Group 15 Elements Group 16 Elements Dioxygen Chemical Reactions Dinitrogen Dioxygen The Oxygen Family Halides And Oxides Hydrogen Chloride Interhalogen Compounds Halogens Oxoacids Phosphorus Trichloride Nitric Acid Properties The Noble Gases Alcohols And Phenols C-O Bond Cleavage Phenol Preparation Ethers Alcohols General Preparation Alcohols Industrial Preparation Nomenclature Alcohols Physical Properties Phenols Preparation Phenolic Group Reactions Alkyl Group Reactions Some Commercial Alcohols Chemicals In Food Cleansing Action Of Soaps Drug Target Interaction Drugs And Medicines Non-Soapy Detergents Soaps Types Of Drugs Haloalkanes Chemical Properties Halides, Aryl Halides Haloalkanes And Halorenes Nucleophilic Substitution Halides Nomenclature Haloalkanes Physical Properties Haloarenes Physical Properties Polyhalogen Compounds Haloalkanes From Alcohols Haloalkanes From Hydrocarbons Cannizzaro Reaction Carboxylic Acid Preparation Of Acids Oxidation In Aldehydes Aldehydes, Ketones Properties Carboxylic Acid Properties Aldehydes, Ketones Preparation -COOH Group Reactions -OH Group Replacement Aldehydes, Ketones Reduction Carbonyl Oxygen Atom Commercial Carbonyl Compounds Commercial Carboxylic Acids Amines Amines Character Amines Chemical Properties Cyanides, Isocyanides Diazonium Salts Amines Types Aliphatic Amines Nomenclature Ortho Effect Amines Physical Properties Preparation Of Amines Diazonium Salts Properties Amines With Nitrous Acid Amines With Aldehydes Amines-Structure Basicity Biodegradable Polymers Polymerization Mode Polymers-Molecular Forces Polymers-Molecular Mass Natural, Synthetic Polymers Natural Rubber Polymers Condensation Polymers Polydienes Preparation Polyhallolefins Preparation Structure Based Polymers Synthetic Rubber