假如一個chemical cell 有兩個reactivity不同的metal and salt solution of theirs metal ions
如果冇左salt bridge,點解會冇左current?
但係唔係就算冇salt bridge,都會有electrons transfer,咁應該會有current,點解冇o既?
同埋,ions 許一個half-cell係move to另一個half-cell定係move to salt bridge?
2007-01-29 20:43:13 · 2 個解答 · 發問者 2003 2 in 科學 ➔ 化學
呢個唔係化學問題,呢個係物理問題.因為冇O左SALT BRIDGE,即係OPEN CIRCUIT,點會有電流?
electron transfer由邊度去邊度?solution去METAL?佢O地之間有直接接觸,唔會經電線,所以唔會有電.
兩個half-cell之間隔住O左salt bridge,所以ions係去salt bridge同electrodes.防止ions去另一個half-cell正正係salt bridge O既目的.
噉先可以避免唔想要O既金屬deposit O係electrode上面.
2007-01-29 22:35:58 · answer #1 · answered by ? 5 · 0⤊ 0⤋
LowB,答錯野,
冇左SALT BRIDGE一樣有current
只不過會跌得好快
2007-05-27 12:30:50 · answer #2 · answered by chak lam 1 · 0⤊ 0⤋