4s4 electrolysis( Part 1)

ELECTROCHEMISTRY Electrolyte Vs Non-electrolyte

Learning outcomesAt the end of the lesson, you should able to:state the meaning of electrolyte.Differentiate between the conductor and electrolyte.classify substances into electrolytes and non-electrolytes.relate the presence of freely moving ions to electrical conductivity.

Electrolyte in daily lifeWhy the athletes drink 100-plus drinks or other electrolyte drinks after their vigorous training? What is the function of electrolyte to the body? Sweating is the way in which the body maintains its core temperature at 37°C. This results in the loss of body fluid and electrolytes (minerals such as chloride, calcium, magnesium, sodium and potassium) and if unchecked will lead to dehydration and eventually circulatory collapse and heat stroke.Electrolytes, especially sodium and potassium, in a drink will reduce urine output, enable the fluid to empty quickly from the stomach, promote absorption from the intestine and encourage fluid retention.

ExperimentPreviousC. To Investigate the Electrical Conductivity of CompoundsTitle:To compare the properties of ionic and covalent compoundsProblem statement:Do electrical conductivity of ionic compounds and covalent compounds differ in solid state and molten state?

CarbonelectrodesMolten NaCl conducts electricity

NaCl solutionNaCl solution conducts electricity

Electrical conductivityMoltenNaCl, NaClsolutionThey can conduct electricity - due to the presence of free moving / mobile ions in the electrolytes are electrolytes

--+Electrolytes can conduct electricity due to the presence offree moving ions in the electrolytesEg.: NaCl solution+electrolyte-_ _ _ _ _ _ _ _ _+-_ _ _ _ _ _ _ _+_ _ _ _ _ _ _ _ _-+_ _ _ _ _ _ _ _-_ _ _ _ _+_ _ _ _

Electrolyte Vs Non-electrolyte

MoltenMelted in high temperature.A metal in its liquid state.

Think……Electricitycan passes through a Cu wire but there is NO chemical reaction taking place.Do you classify Cu wire as an electrolyte?Answer: No. Copper wire is not an electrolyte. It is a conductor. Because copper wire is in solid state and it does not undergo chemical reaction.

Conductor Vs ElectrolyteConductor Electrolyte

Electrolyte ? Non-electrolyte ?ElectrolyteHClsolutionNH3solutionGlucose solutionMolten lead, PbAgClsolutionTetrachloromethane, CCl4Zinc wireCopper pennyNon-electrolyteNon-electrolyteNon-electrolyteElectrolyteNon-electrolyteConductorConductor

ElectrolysisA process whereby a compound in molten or aqueous state are broken down into its constituent elements by passing electricity through an electrolyte.

Electrolytic cellBatteryAmmeter(A device used to measure current) / Light bulbWireSwitchElectrodes (Carbon / metal) - a conductor in the form of wire, rod or plate which carries electric current in and out of the electrolyte during electrolysis.Electrolyte

Cations & AnionsCations are pawsitive. or= positiveCations are + ve. AnionisaNegative ion

Cations Cathode(+ve ions)Anions Anode(-ve ions)

Form 5“AnOX chases a Red CAT “(Reduction-Cathode)(Anode-Oxidation)or(both start with vowels)(both start with consonants).

Oxidation Vs Reduction: Form 5“ L E O goes G E R ”(lose electron-oxidation, gain electron-reduction)“O I L R I G ”(Oxidation is Losing e-, Reduction is Gaining e- )“ ELMO”(Electron Loss Means Oxidation )“LEO the lion. GER! “ or “ LEO says GER”(Losing Electrons Oxidation, Gaining Electrons Reduction)

4s4 electrolysis( Part 1)

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4s4 electrolysis( Part 1)