[高中] 這2題可逆反應為什麼答案是如此呢?
( )25℃時將鉻酸鉀(K2CrO4) 固體溶於100毫升水達溶解平衡,且有固體存在,
下列敘述何者錯誤?
(A)溶液為電中性 (B)溶液中K+離子數:CrO42- 離子數=2:1
(C)溶液中[H+]=10-14M (D)溶液呈黃色。
答案是C
想請教的是,為什麼氫離子濃度不能是10-14呢?
會有什麼問題嗎?
謝謝~~~
( )Br2 + H2O <---> H+ + Br- + HbrO,上述化學平衡中,
加入酸會有何變化? B
(A)略 (B)正反應變慢
(C)略 (D)略
答案是B
但我覺得不太對吧?加酸會讓生成物更多,逆反應更快,
但應該不影響正反應速率吧?
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