基本化學知識
2013-06-11 4:22 am
酸的體積多，所發生的反應是否越強？（例如有三支試管，內裡盛有氫氯酸，以及三條一樣大小的鎂帶，但氫氯酸在三支試管體積分別是5、10、15，想問一下試管體積最多的，是否和鎂帶所發生的反應越強？）請附加解釋，謝謝！
回答 (4)
2013-06-11 7:08 pm
✔ 最佳答案
否, 反應速度一樣.化學反應的速度是基於反應物間有效撞擊(EFFECTIVE COLLISION)的頻率.
簡單來說撞擊次數愈高, 有效撞擊次數愈高.
不同體積, 相同濃度的酸都會為鎂帶帶來相同的撞擊次數.
試想想, 鎂帶放在酸裡的任何一個地方, 鎂帶都會受到相同的撞擊次數.
得出相同的速率. (注意: 釋出之氫氣量可能會不同, 這要看看那一反應物是限量反應物)
2013-06-12 7:22 am
Mg+2HCl--------->MgCl2+H2
你要留意限量反應物
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你要留意限量反應物
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2013-06-11 6:29 am
No
As the rate of reaction is independent from the number of mole / (volume) of reactant (acid), so under the same concentration, temperature, atmospheric pressure and surface area for Mg to react with HCl, the three test tube have the same reaction rate.
2013-06-10 22:32:27 補充：
Rate of reaction will increase when concentration, temperature and surface area for reaction increase.
As the rate of reaction is independent from the number of mole / (volume) of reactant (acid), so under the same concentration, temperature, atmospheric pressure and surface area for Mg to react with HCl, the three test tube have the same reaction rate.
2013-06-10 22:32:27 補充：
Rate of reaction will increase when concentration, temperature and surface area for reaction increase.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130610000051KK00253