pH 為 2 的強酸溶液,加水稀釋為原體積的 1000 倍後,pH 值約為何?

Answer and explanation

Correct answer: C. 5

  1. Step 1: 稀釋 1000 倍, 變為原來的 。
  2. Step 2: M,pH 。
Answer
5.
Why not the others: 8:稀釋倍數的對數被算了兩次;2:以為稀釋不會改變 pH;-1:稀釋後酸性不會增強,pH 應變大。

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