1. 首先分析镁和氧化铜反应: - 镁和氧化铜在加热条件下可能发生反应\(Mg + CuO=\!=\!=Cu + MgO\)。 2. 然后将反应后的固体加入足量硫酸中: - 如果镁过量,镁会和硫酸反应\(Mg + H_{2}SO_{4}=\!=\!=MgSO_{4}+H_{2}\uparrow\),会看到有气泡产生。 - 反应生成的氧化镁\(MgO\)也会和硫酸反应\(MgO + H_{2}SO_{4}=\!=\!=MgSO_{4}+H_{2}O\)。 - 若氧化铜有剩余,氧化铜与硫酸反应\(CuO + H_{2}SO_{4}=\!=\!=CuSO_{4}+H_{2}O\)。 - 如果之前反应生成了铜,铜与稀硫酸不反应。 综上,将足量硫酸加入镁和氧化铜反应后的固体中,可能会看到有气泡产生(镁过量时),反应后的溶液中会有硫酸镁、可能有硫酸铜等溶质,固体可能有铜(如果生成且未反应完)。 点击前往免费阅读更多精彩小说
The reaction between copper and sulfuric acid could be divided into two situations. If it was a reaction between copper and concentrated sulfuric acid, the phenomenon would be extremely obvious. The copper plate would quickly dissolve, and the solution would turn from colorless to blue-green. At the same time, a large amount of reddish-brown gas would be produced, which was nitrogen dioxide. What if copper reacted with dilute sulfuric acid? The copper would slowly dissolve, and the solution would turn blue, but the gas produced would be colorless nitrogen dioxide. However, the nitrogen dioxide would react with the oxygen in the air and turn into reddish-brown nitrogen dioxide. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Anhydrous copper sulfuric acid can react with water to form copper sulfuric acid. After heating copper sulfuric acid to lose crystal water, it can be restored to blue crystal copper sulfuric acid if it is put into alcohol or water-containing organic matter. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The reaction between copper dioxide and diluted sulfuric acid would cause such a phenomenon. Copper dioxide was a black solid. When it reacted with diluted sulfuric acid, the black copper dioxide would gradually dissolve, as if the small black particles were slowly disappearing. At the same time, the solution would slowly turn from colorless to blue. This was because the reaction between copper dioxide and diluted sulfuric acid produced copper sulfuric acid and water, and the copper sulfuric acid solution was blue. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The reaction between iron (Iron) and copper (CuSO2) is a substitution reaction. Iron is more mobile than copper, and copper can be replaced. The reaction equation is: FeSO2 = FeSO2 + Cu2. The reaction phenomenon was: red substance (copper) was deposited on the surface of the iron layer, because copper was a red metal with metallic luster; the solution changed from blue (the color of copper sulfuric acid solution) to light green (the color of FeSO2 solution), and finally to brown. This was because the iron ions in the solution were unstable and would continue to be oxided into iron ions, and the iron ions in the solution would appear brown. From the reaction principle, the copper sulfuric acid solution was blue and weakly acidic, so the iron was corroded first, forming a pair of iron ions. At the same time, because the metal activity of iron was stronger than that of copper, a replacement reaction occurred, and the copper ions in the solution were replaced and reduced to copper. Because iron was a solid, after it was immersed in the copper sulfuric acid solution, the reaction occurred on the surface of the metallic iron, so the copper produced by the reaction would adhere to the surface of the metallic iron. If the immersion area was not large enough, and the concentration of the copper sulfuric acid solution was very high, the chemical reaction would stop when it reached a certain degree. The copper attached to the surface of the iron would protect the iron, so that it could not continue to react. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The bronze (Cu2 (Ox) 2 CO2) reacted with dilute sulfuric acid to form copper nitrates (Cu2 (Ox) 2), water (H2 O), and carbon dioxide (CO2). The reaction equation was Cu2 (Ox) 2 CO2 + 4HNO2 = 2Cu2 (Ox) 2 + 3H2 O + CO2. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
电解硫酸铜溶液时,阳极反应式为\(4OH^{-}-4e^{-}=O_{2}\uparrow+2H_{2}O\),阴极反应式为\(2Cu^{2 +}+4e^{-}=2Cu\),总反应式为\(2CuSO_{4}+2H_{2}O = 2Cu+O_{2}\uparrow+2H_{2}SO_{4}\),实际减少的是\(Cu\)和\(O_{2}\),因此恢复原溶液要用\(CuO\)。如果加\(Cu(OH)_{2}\)就相当于加入\(CuO + H_{2}O\),会稀释溶液。 <a href="/?from=ask_words" style="color:red" target="_blank">点击前往免费阅读更多精彩小说</a>
Copper Sulphate (CuSO) is a white powder. When water is added, it will undergo a hydrating reaction (CuSO +5H ^O CuSO·5H ^O). Due to the formation of copper ions, the white color of copper sulphate will turn into blue crystalline particles (copper sulphate). Its water solution (Copper Sulphate Solution) was sky blue and weakly acidic. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
In a primary battery composed of copper (Cu) and dilute sulfuric acid, the negative reaction formula was: Cu -2e = Cu2. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
When the iron reacted with the copper sulfuric acid solution, the surface of the iron layer would release a red substance, and the solution would turn from blue to light green and finally brown. This was because the copper sulfuric acid solution was blue and weakly acidic, so the reaction first corroded the iron and formed the iron ions. The iron ions solution was light green, causing the solution to change from blue to light green. At the same time, because the metal activity of iron was stronger than copper, a replacement reaction occurred. The copper ions in the solution were replaced and reduced to copper. The copper was red, and red substances were separated from the surface of the iron. Subsequently, the iron ions in the solution were unstable and would continue to be oxided into iron ions. The iron ions in the solution were brown, so the solution would turn from light green to brown. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The reaction between copper and concentrated sulfuric acid required heating. Under heating conditions, copper gradually dissolved and bubbles were formed. The gas produced could turn purple litmus red or the fuchsia solution faded. After cooling, the solution diluted and turned blue. The reaction equation was: CuSO4 + SO2 → +2H2O. At the same time, there are side reactions such as 5Cu +4H2SO4 (concentrated)(heating)= 3CuSO4 + Cu2S +4H2O. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>