航空百大

標題:

Chemistry Equation

• 屯門碼頭通宵車去荃灣
• pps 無法使用搜尋列表及亂碼的問題
• 一對男女有左bb,,男女已不愛對方,,相方爭個bb,,

 

此文章來自奇摩知識+如有不便請留言告知

發問:

Write equation for the reacion of dilute nitric acid with (i) marble chips (ii) Zinc Granules 唔該解釋埋呀,,, 更新: 要係equation,,,,

最佳解答:

(i) Marble chips contains mainly calcium carbonate. It is the property of acid that an acid solution can reacts with metal carbonate to give a salt, carbon dioxide and water. CaCO3(s) + 2HNO3(aq) → Ca(NO3)2(aq) + H2O(l) + CO2(g) (ii) Dilute nitric acid is an oxidizing agent, while zinc is a reducing agent. Therefore, no hydrogen gas would be formed when dilute nitric acid and zinc react. Instead, a redox reaction occurs. Dilute Nitric acid is reduced to nitrogen monoxide, while zinc is oxidized to zinc ion. 3Zn(aq) + 8HNO3(aq) → 3Zn(NO3)2(aq) + 4H2O(l) + 2NO(g) or: 3Zn(aq) + 8H+(aq) + 2NO3-(aq) → 3Zn2+(aq) + 4H2O(l) + 2NO(g)

其他解答:

1. CaCO3+HNO3->Ca(NO3)2+CO2+H2O 2. Zn+2HNO3->Zn(NO3)2+H2|||||u mean chemical equations? Well, u can try with the word equations provided. These 2 are very easy ones and u should know them well.|||||nitric acid + zinc = zinc nitrate + hydrogen marble = calcium carbonate nitric acid + calcium carbonate = calcium nitrate + carbon dioxide + water