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Corrosion
Corrosion is a slow, continuous deterioration of metals caused by reactions with substances in the environment, such as oxygen, water, acids, salts (electrolytes).
Displacement reaction
A displacement reaction happens when a more reactive metal displaces a less reactive metal from one of its compounds (usually a solution of a salt).
Electrochemical cell
A simple electrochemical cell (also called a voltaic or galvanic cell) converts chemical energy from a spontaneous redox reaction into electrical energy.
Endothermic reaction
An endothermic reaction is a reaction that absorbs energy (usually heat) from its surroundings.
Enthalpy $H$
A measure of the total heat content of a system at constant pressure.
Exothermic reaction
An exothermic reaction is a reaction that releases energy (usually heat) into the surroundings.
Neutral solution (at 25 °C)
A solution is neutral if $\left[\mathrm{H}^{+}\right]=\left[\mathrm{OH}^{-}\right]$ and its pH = 7.
Neutralization
Neutralization is the reaction in which hydrogen ions (H⁺) from an acid react with hydroxide ions (OH⁻) from a base to form water.
Solution
A solution is a homogeneous mixture where the particles of the solute are completely dissolved in the solvent.
Titration
A titration is a technique used to find the concentration of an unknown solution by reacting it with a solution of known concentration.