sodium carbonate時用dilute hydrochloric acid >>>gas bubbles given off---sodium chloride時用dilute nitric acid followed by silver nitrate solution>>>white precipitate appear---sodium sulphate時用dilute hydrochloric acid followed by barium chloride solution>>>white precipitate appear
1)我想問,點解要隻隻compound都用唔同既acid??如果用其他acid會點?2)同埋而家呢個test仲可唔可以比較佢d results?但係佢用既acid都唔同..3)如果係得既,敢呢個test証明左乜???佢既大前提係find out the elements contained in common salt.....
我上chem堂時test一d common sodium compounds..
2007-10-28 6:05 am
回答 (2)
2007-10-28 6:15 am
✔ 最佳答案
In short,這些QA 是利用不同acid or chemical 對element 的的特性作出分辨, step by step, 然後by elimination 找出答案...就是抽絲剝繭...
參考: my chemistry teacher
2007-10-28 6:22 am
Acid+Alkali = Salt+Water
Hydrochloric acid+Metal = Metal chloride+Water
Sulfric acid+Metal = Metal sulfate+Water
Nitric acid+Metal = Metal nitrate+Water
Acid+Canbonate = Salt+Water+Carbon Dixoide
Hydrochloric acid+Metal carbonate=Metal chloride+Carbon Dixoide
Sulfric acid+Metal = Metal sulfate+Water+Carbon Dixoide
Nitric acid+Metal = Metal nitrate+Water+Carbon Dixoide
Acid+Metal = Salt+Hydrogen
Hydrochloric acid+Metal = Metal chloride+Hydrogen
Sulfric acid+Metal = Metal sulfate+Hydrogen
Nitric acid+Metal = Metal nitrate+Hydrogen
Chloride,Sulfate and Nitrate are salt.
If you use other acid, it will give different product.
Hydrochloric acid+Metal = Metal chloride+Water
Sulfric acid+Metal = Metal sulfate+Water
Nitric acid+Metal = Metal nitrate+Water
Acid+Canbonate = Salt+Water+Carbon Dixoide
Hydrochloric acid+Metal carbonate=Metal chloride+Carbon Dixoide
Sulfric acid+Metal = Metal sulfate+Water+Carbon Dixoide
Nitric acid+Metal = Metal nitrate+Water+Carbon Dixoide
Acid+Metal = Salt+Hydrogen
Hydrochloric acid+Metal = Metal chloride+Hydrogen
Sulfric acid+Metal = Metal sulfate+Hydrogen
Nitric acid+Metal = Metal nitrate+Hydrogen
Chloride,Sulfate and Nitrate are salt.
If you use other acid, it will give different product.
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