平時既balance我明
e.g Na2CO3 + 2HCl --->2NaCl +CO2+H2O
Na2CO3 有2個Na 所以NaCl都有2個Na
但到左acid果個話溶左幾多個H+果到有d唔明...
e.g Phosohoic acid and sodium hydroxide 1:1<<<
acic salt).
1)H3PO4 + NaOH------>NaH2PO4+H2O
2)NaH2PO4 + NaOH ----> Na2HPO4 +H2O
------------
normal salt)
3)Na2HPO4+NaOH ----->Na3PO4+H2O
以上D式係岩既
就3)果條我問過人佢地話Na2 + Na =Na3 所以balance
咁就有個2問題俾我引生出黎
1)若個Na2 + Na =Na3行得通 咁個PO4既
Na+ PO4 3- == Na3PO4 但係個Na3係Na2 + Na =Na3出黎既
咁個PO4 3-去左邊......
-------------------------------------------------------------------------
果d (NaH2PO4) (NaOH)都當成舊黎睇so唔駛balance
但點解呢條既Na2CO3 + 2HCl --->2NaCl +CO2+H2O
HCl要 balance
-----------------------------------------------------
唔知你地明唔明我講咩啦~希望你地明= =
詳細解釋下= =