21. Use structure arguments to identify the strongest acid in this group: HFo, H

Question

21. Use structure arguments to identify the strongest acid in this group: HFo, Holo, HBro, HIO 22. In this reaction, should we expect the reactants or the products to be favored? H2SO4 (aq) CO32 aq) HSO4 (aq) HCO, (a Choices: Reactants favored a lot (almost complete reaction) Reactants favored somewhat (equilibrium), Products favored a lot (almost complete reaction), Products favored somewhat (equilibrium) 23. Enough nitric acid is added to pure water to make a formal concentration of 1.50x10s M HNO, Determine the pH of the solution using systematic treatment of equilibrium. 24. Calculate the pH of a 0.0075 M lactic acid solution. HC3H5o4, K 1.4x104 Consider the next two questions together. 25. Calculate the pH of a 0.275 M carbonic acid solution. H2CO, Kal 4.3x10 7, Ka2 4.8x10 11 26. Determine the concentration of carbonate, co?, in the 0.275 M carbonic acid solution from the previous problem. H2CO3, Kal 4.3x10 Kaz 4.8x10 11 27. What is the pH of a 0.855 M solution of sodium butanoate?The Kafor butanoic acid is 1.52x10s Consider the next two questions together. 28. If hydrochloric acid is added to a solution of hydrofluoric acid in water, how will the weak-acid dissociation change? Choices It will increase, It will decrease, It will not change

Explanation / Answer

21. Acidic strength is directly proportional to stability of conjugate base. Out of given options HIO is the strongest acid due to most stable conjugate base.

22. We know that H2SO4 is very strong acid and much stronger then Carbonic acid so the given reaction would be favoured a lot in forward direction.

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