[化學] 化學式：KOH + H3PO3 會變成什麼

KOH 是一個強鹼，而 H3PO3是一個弱酸。雖然每個 H3PO3分子含有三個氫原子，但只有其中兩個氫離子可解離成氫離子，所以它是一個二質子酸（二元酸）。

KOH 與 H3PO3發生中和，化學反應式如下：
KOH + H3PO3 → KH2PO3+ H2O

若 KOH 過量，則可進一步發生以下中和反應：
KOH + KH2PO3 → K2HPO3+ H2O

以上兩化學反應式可合併成以下反應式：
KOH + H3PO3 → K2HPO3+ 2H2O

Micatkie is CORRECT. There are only two ionizable H atoms in H3PO3 molecule, although the molecule contains three H atoms.

2013-11-18 09:55:52 補充：
In an H3PO3 molecule, the central atom P is linked to one P=O bond, one P-H bond and two P-OH bonds. Only the two H atoms in "P-OH" is ionizable, and that in "P-H" is NOT.

2013-11-18 09:56:06 補充：
Therefore, the final product in neutralization is K2HPO3, but NOT H3PO3.

最後會變成
3KOH+1H3PO3 -> 1K3PO3 +3H2O
剛開始兩個要交換
因為K=Potassium(1+)
所以要換成PO3=Phosphite which is (3-)
so it will be K3PO3
然後H=Hydrogen (1+)
OH= hydroxide(1-)
so it will be H2O which is water
and finally balance
become 3KOH+1H3PO3 -> 1K3PO3 +3H2O
left hand side is 3K 3O 4H 3PO3
right hand side is 3K 3O 4H 3PO3
Hope you like it^^