How does the pH value of potassium hydroxide solution compare with that of 1M aqueous ammonia? explain
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Answer:That’s because OH- is a strong base and will give a pH of 14 + log (c) when the concentration is c M.
Ammonia (NH3) is a weak base that will react wih water in an equilibrium reaction:
NH 3 + H 2 O ⇄ NH +4 + OH −
This equilibrium lies quite far to the left (at standard conditions), so when e.g. 1.0 mole of NH3 is dissolved in 1.0 L of water, only a small amount of OH- will be formed (0.0042 mol), leading to a much lower pH than when the same amount of KOH is dissolved.
0,1 M KOH-solution has a pH of 13.0, 0.1 M NH3 solution will have a pH of 11.1.
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Explanation:
0,1 M KOH-solution has a pH of 13.0, 0.1 M NH3 solution will have a pH of 11.1.
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