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एक दुर्बल अम्ल (HA) का `pK_(a)` मान 4.5 हैं| एक अम्ल जो `50%` आयनिक हैं, का pOH मान (HA) की बफर विलयन में) होगा|
A. `4.5`
B. `2.5`
C. `9.5`
D. `7.0`

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Correct Answer - c
HA का जलीय बफर विलयन = `50% HA` आयनित हैं|
दुर्बल अम्ल HA का बफर विलयन `to` अम्लीय बफर
pH`=pK_(a) + log([A^(-)])/([HA])`
या `pH=4.5`
pOH + pH = 14
pOH = `14-4.5=9.5`

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