[問題] 緩衝溶液稀釋七倍 pH會改變嗎?
這是我的問題
緩衝溶液(Buffer Solution)由0.2M 醋酸(Acetic Acid)和0.16M 醋酸鈉(Sodium
Acetate)所組成:
1.請問此緩衝溶液之pH 為何?堦
2.若將此緩衝溶液稀釋七倍則溶液之pH 為何?壜
(醋酸分子式為CH3COOH,25℃之解離常數(Ka)為1.75 × 10^-5)
第一題我由 pH = pKa + log(醋酸鈉/醋酸)
可算出此緩衝溶液之pH為4.66
那如果稀釋七倍後 pH會如何改變呢??
謝謝
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