S.4 Electrochemistry 1 Caltec S.4

1 MunicelELECTROCHEMISTRY Thisis a branch of chemistry which deals with changes in electrical energy caused by chemical reactions. It is subdivided into three sections, electrolysis, applications of electrolysis and electrochemical cells. ELECTROLYSIS Definition: This is the decomposition of a substance when in solution or molten state by passing an electric current through it. Terms used in electrolysis 1.Electrolyte This is an ionic compound which when in solution or molten state allows a current to go through it and becomes decomposed. Types of electrolytes a.Strong electrolytes These are electrolytes which completely dissociate or ionize in dilute solutions examples include i)All strong mineral acids when dilute e.g. dilute sulphuric acid, dilute nitric acid and dilute hydrochloric acid. ii)All aqueous solutions of soluble salts e.g. NaCl, CuSO 4, Al2(SO4)3etc iii)All strong alkalis while in solution i.e. NaOH and KOH 1 MunicelELECTROCHEMISTRY Thisis a branch of chemistry which deals with changes in electrical energy caused by chemical reactions. It is subdivided into three sections, electrolysis, applications of electrolysis and electrochemical cells. ELECTROLYSIS Definition: This is the decomposition of a substance when in solution or molten state by passing an electric current through it. Terms used in electrolysis 1.Electrolyte This is an ionic compound which when in solution or molten state allows a current to go through it and becomes decomposed. Types of electrolytes a.Strong electrolytes These are electrolytes which completely dissociate or ionize in dilute solutions examples include i)All strong mineral acids when dilute e.g. dilute sulphuric acid, dilute nitric acid and dilute hydrochloric acid. ii)All aqueous solutions of soluble salts e.g. NaCl, CuSO 4, Al2(SO4)3etc iii)All strong alkalis while in solution i.e. NaOH and KOH 1 MunicelELECTROCHEMISTRY Thisis a branch of chemistry which deals with changes in electrical energy caused by chemical reactions. It is subdivided into three sections, electrolysis, applications of electrolysis …