Unit 17 Concentration of solutions and volumetric analysis

Acid-alkai indicator

Acid-alkai indicator - a compound which would shows different colour according to their pH value

Back titration

Back titration - a quantitive analysis used to determine the concentration (or amount) of a substance by an indirect method

Burette

Burette - a piece of equipment used to deliver a varied accurate volume of a solution

Concentration

Concentration - describe the amount of solute in the solution

Dilution

Dilution - the process to achieve the desired molarity of a solution by adding water

Electronic balance

Electronic balance - used to measure the mass of a substance

Equivalence point

Equivalence point - the point in an acid-alkali titration at which the reactants just react completely with each other

Meniscus

Meniscus - a curved surface of water or aqueous solution on the graduation mark of volumetric flask

Methyl orange

Methyl orange  - a common indicator used in the laboratory

Phenolphthalein

Phenolphthalein - a common indicator used in the laboratory

Pipette

Pipette - a piece of equipment used to deliver a fixed accurate volume of a solution

Pipette filler

Pipette filler - a piece of equipment used to suck liquid into a pipette

Standard solution

Standard solution - a solution with an accurately known concentration

Titration

Titration - a quantitive analysis used to determine the concentration of an acid or alkali in a sample by neutralization using an indicator

Titration curve

Titration curve - a graph which shows the pH changes during a titration

Titre

Titre - the amount of solution delivered by the burette

Volumetric analysis

Volumetric analysis - a method of finding out the concentration (or amount) of a substance in a sample

Volumetric flask

Volumetric flask - a flask used to deliver a fixed accurate volume of a solution

Weighing bottles

Weighing bottles - an apparatus that uses to store the chemical being weighted

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