4. Calculate the pH of a solution prepared by dissolving 10.0 g of tris(hydroxymethyl)-aminomethane ("tris"; FM: 121.136 g/mol) plus 10.0 g of tris hydrochloride (FM: 157.597 g/mol) in 0.250 L of water.
(A) 8.19
(B) 8.25
(C) 9.05
(D) 8.37 (Ε) 7.52

1. 題目解析題目要求計算由10.0...