Lecture Notes

(Chem. 10)

"Lecture Notes5b

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Acid –base indicator

Acid – base indicator is a weak acid that changes color with the pH of solution:

HIn ======= H⁺ + In^-

Chapter 16

Oxidation and reduction reactions:

Dealing with transferring of electrons

The element has lost electron(s): oxidized

The element has gained electron(s): reduced

Electrochemistry

Involving electricity in a chemical reaction

Electrolysis: electricity + reactants = chemical reaction (oxidation-reduction)

Reactants + electrical energy (electricity) = products

Voltaic cell or galvanic cell : chemical reaction (oxidation-reduction) produces electricity

Reactants = products + electricity

Apparatus for electrochemical reaction : electrochemical cell