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angela2007
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Mn2+ + 2 H2O - MnO2 + 4 H+ + 2 e− ( −1.22 V), this reaction is acucurate. the standard potential is negative, then why all the work for the formation of MnO2 need to be done in anodic potential?
Electrochemistry is the branch of chemistry that studies the relationship between electricity and chemical reactions. It involves the study of how electricity can be used to drive chemical reactions or how chemical reactions can produce electricity.
The potential of a redox reaction can be measured using a device called a voltmeter. The voltmeter measures the potential difference between two electrodes placed in a solution containing the redox reaction. The potential is measured in units of volts (V).
Anode is the electrode where oxidation occurs, while cathode is the electrode where reduction occurs. In other words, anode is where electrons are lost and cathode is where electrons are gained.
Yes, electrochemistry has many practical applications in everyday life. It is used in batteries to power electronic devices, in the production of metals such as aluminum and copper, and in the purification of metals through electrolysis. It is also used in electroplating and in fuel cells for alternative energy sources.
Electrochemistry is involved in corrosion as it is a type of redox reaction. When a metal is exposed to a corrosive environment, the metal atoms undergo oxidation, losing electrons and forming ions. These ions then react with other substances in the environment, leading to the deterioration of the metal. This process can be prevented by using protective coatings or sacrificial anodes.