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Kris Quinlan

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LECTURE 9 Acids and Bases Equilibria Slide No. Notes Last slide - k small not many ions of last - all types of equilibrium equations, all have similar behaviour lecture starting at a point not at equilibrium, then tending to equilibrium 1 - H2S is the acid - NH3 is the base - Conjugate base is the HS, conjugate acid is the NH4 - Conjugate acid-base pairs: the H2S and HS, and the NH3 and NH4 - Each acid-base pair related by one proton - Water can both give proton, and receive proton 2 - from left to right: acid base - H3O+ is also the acid - Acid weaker than H3O+ therefore equilibrium shifts to products side - Strong acid wants to give protons, strong bases want to receive protons - Strong acids are more reactive - The stronger the acid, the weaker the conjugate base 3 - Ans: A - HNO2 is the stronger acid - Direction of reaction is towards the products side
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