1.上網見caco2=calcium carbonate,好奇怪,唔係caco3先係calcium carbonate嗎?到底咩係caco2?

2.我知道dilute acid + metal-->salt+h2,不過如果唔係dilute acid而係conc acid,會點?

3.H2CO3同HCO3-有咩唔同,佢地各有咩特性?

4.calcium dioxide + carbonic acid → calcium hydrogencarbonate<<<呢題formula係咪真的?calcium dioxide係咪=caco2?

5.oxidizing agent自己係咪做reduction?相反reducing agent自己係咪做oxidation?


6.CO2同carbonate有咩關係?點解一heat carbonate,就會有CO2 evolved?


7.dilute左的HNO3會唔會volatile??係咪要conc.的acid先會volatile?噤volatile出黎的acid mist又係咪toxic??


好多問題,真係唔識,多謝賜教!!

我中5,讀英文的

1.caco2
應該無呢隻野 可能打錯
http://en.wikipedia.org/wiki/Carbonate
conc. sulpuic acid + metal

4.calcium dioxide + carbonic acid → calcium hydrogencarbonate<<<呢題formula係咪真的?
CaO2 + H2CO3 →  CO2(g) + H2O(l) + CaCO3(s)→ Ca(HCO3)2