我唔係好明一d野
potassium , sodium ,calcium 都係1d very reactive ge metal
如果佢地放在冇 咁reactive ge metal solution , 有displacement
仲會有bubbles 即 Hydrogen
佢地會同solution 中的water react ,咁個displacement 仲會發生
但條equation 點寫??
另外 ,其實係唔係咩 solution 都有water??
eg sodium metal 同 zinc sulphate
first 寫 sodium +_________ -----------------> _____________ 係點寫ar??
之後 應該係點樣ar?? sodium 係唔係會displace 個zinc 出黎
之後equation 又點寫??
Plz help me
Chem 1問 10分
2007-01-06 7:43 am
回答 (2)
2007-01-07 10:01 am
✔ 最佳答案
when sodium reacts to give hydrogen, this is because sodium reacts with water in the solution.2Na + 2H2O → 2NaOH + H2
not all solution contain water, only aqueous solution has.
sodium reacts with zinc sulphate
2Na + ZnSO4 → Na2SO4 + Zn
from the equation, as you can see, Zn is formed. that is, zinc metal is displaced out and become a metal.
參考: me
2007-01-06 7:48 am
potassium , sodium ,calcium 係唔會 displace 到 溶液中冇咁 reactive 嘅 metal
因為potassium , sodium ,calcium一加入液即同水有反應
因為potassium , sodium ,calcium一加入液即同水有反應
收錄日期: 2021-04-12 20:25:16
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070105000051KK04746