寫出下列難溶電解質(zhì)的溶度積常數(shù)表達(dá)式:
某一元弱酸(HA)試樣1.250g,用水溶解后定容至50.00mL,用41.20mL、0.0900molL-1NaOH標(biāo)準(zhǔn)溶液滴定至化學(xué)計(jì)量點(diǎn)。加入8.24mLNaOH溶液時(shí),溶液pH為4.30。求: