How to determine Acidic and Alkaline Buffer Solutions Ionic Equilibria

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In this video we want to discuss Buffer Solutions. • 1. Definiton of a Buffer Solution • We know that a buffer solution is one that maintains pH when small amounts of H+ or OH- is added to it. • This means that inside this buffer, the following components must be present: • an acid to remove OH- • a base to remove H+ • This mixture of acid and base must be of a conjugate acid-base pair, otherwise the acid and base will neutralise each other in the same solution. • 2. Acidic Buffer • An acidic buffer is a mixture of weak acid and salt of conjugate base. • An example is a mixture of CH3COOH and CH3COONa. • For this mixture of conjugate acid-base pair: • CH3COOH is the acid that removes OH- • CH3COO- is the base that removes H+ • We can show how H+ and OH- is removed via neutralisation reactions: • Since H+ and OH- is removed, therefore pH is maintained. • 3. Alkaline Buffer • An alkaline buffer is a mixture of weak base and salt of conjugate acid. • An example is a mixture of NH3 and NH4Cl. • For this mixture of conjugate acid-base pair: • NH4+ is the acid that removes OH- • NH3 is the base that removes H+ • We can show how H+ and OH- is removed via neutralisation reactions: • Since H+ and OH- is removed, therefore pH is maintained. • For the detailed step-by-step discussion on how an acidic and alkaline buffer work, check out this video! • Topic: Ionic Equilibria, Physical Chemistry, A Level Chemistry, Singapore • Found this video useful? • Please LIKE this video and SHARE it with your friends! • SUBSCRIBE to my YouTube Channel for new A Level Chemistry video lessons every week at / chemistryguru • Any feedback, comments or questions to clarify? • Suggestions for new video lessons? • Drop them in the COMMENTS Section, I would love to hear from you! • Learn A Level Chemistry anytime, anywhere with ChemGuru Online! Check out my website for more info on my online video lesson packages at https://chemistryguru.com.sg/a-level-... • ~-~~-~~~-~~-~ • Please watch my latest video: 2019 P1 Q2 - Deflection of Charged Particle in Electric Field • • 2019 P1 Q2 - Deflection of Charged Pa... • ~-~~-~~~-~~-~

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