The metal activity of aluminum was stronger than that of copper. Copper would replace copper from the solution of copper nitrates, and the reaction phenomenon was the production of a silver-white solid. Read more exciting novels for free
The double decomposition reaction between the two substances was found to be the chemical equation of [(ZnCl2}+2NaOx = Zn(Ox) 2}[downarrow+2NaCl2]. The reaction phenomenon was the formation of a white deposit, which was due to the formation of the deposit of the hydrogen dioxide. When there is an excess of NaOx, the reaction equation is [Mn (Ox)_{2}+ NaOx (Ox)_{2}+2H2}O]. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The reaction equation of the reaction between the main component of the acid and the hydrogen dioxide is: 2HNO2 + H ^S = 2H ^O + S ^+ 2NO ^^. Its ion equation is: 2H +2NO +H ^S = 2H ^O + S + 2NO ^. [Phenomenon analysis: During the reaction process, yellow sulfur will be formed and reddish-brown nitrogen dioxide gas will be produced.] This was because the sulfuric acid had strong oxidisation and the hydrogen hydrogen had strong reduction properties. The sulfuric acid oxided the hydrogen into elemental sulfur, which was then reduced to nitrogen oxygen compounds (nitrogen dioxide in this case). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
1. **金属与酸的反应** - **反应方程式及现象(以常见金属镁、铁、锌、铝与稀硫酸反应为例)** - 镁与稀硫酸反应:\(Mg + H_{2}SO_{4}=MgSO_{4}+H_{2}\uparrow\),现象为反应剧烈,有大量气泡产生。 - 铁与稀硫酸反应:\(Fe + H_{2}SO_{4}=FeSO_{4}+H_{2}\uparrow\),现象是有气泡产生,溶液由无色变为浅绿色(因为生成了亚铁离子)。 - 锌与稀硫酸反应:\(Zn + H_{2}SO_{4}=ZnSO_{4}+H_{2}\uparrow\),反应较剧烈,产生气泡。 - 铝与稀硫酸反应:\(2Al+3H_{2}SO_{4}=Al_{2}(SO_{4})_{3}+3H_{2}\uparrow\),产生气泡。 - **反应规律及图像问题(针对初中化学常见考点)** - 当等量的金属分别和足量的酸反应(酸过量)时,反应中最终产生氢气的多少由金属决定。在金属化合价相同的情况下,对于相同质量的金属,金属的相对原子质量越大,生成的氢气越少;生成的氢气越多,金属的相对原子质量越小。 - 当等量的酸分别和足量的金属反应(金属过量)时,反应产生氢气的量由酸的量决定,最终产生氢气的量相等。 - 两种或多种金属与稀酸反应时,反应的快慢(即相同时间内产生氢气的多少)由金属的活动性决定,在温度、金属颗粒大小和稀酸溶液溶质质量分数一定的条件下,金属的活动性越强,生成氢气就越快;生成氢气越快,说明金属的活动性就越强。在图像中,纵坐标通常为产生氢气的量,横坐标可能为时间、消耗酸的质量或消耗金属的质量。 2. **金属与盐溶液的反应** - **反应方程式及现象(以铁丝浸入硫酸铜溶液为例)** - 反应方程式:\(Fe + CuSO_{4}=FeSO_{4}+Cu\),现象为浸入溶液中的铁钉表面覆盖红色物质(铜),溶液由蓝色逐渐变为浅绿色。 - **反应条件及规律** - 金属(钾、钙、钠除外)的活动性强于盐中金属阳离子对应的金属;盐必须可溶于水。当多种金属和多种盐溶液反应时,最活泼的金属先与最不活泼的金属盐反应,再轮到较活泼的金属或金属盐反应。例如向一定量的硝酸银和硝酸亚铁混合溶液中加入锌粉,金属活动性顺序为锌>铁>银,锌先与硝酸银反应,硝酸银完全反应后,若锌还有剩余,则锌再与硝酸亚铁反应。 3. **金属与酸性溶液中的氢离子反应(以酸性溶液与金属反应为例)** - 酸性溶液中的氢离子(\(H^{+}\))会与金属发生反应,如形成氢气,同时金属逐渐溶解,但未明确具体金属时无法给出确切方程式。 4. **特殊金属与溶液反应(如金属铋与稀硝酸反应)** - 放入金属铋,加入稀硝酸,加热试管,冷却后加水稀释,反应方程式为\(Bi + 4HNO_{3}=Bi(NO_{3})_{3}+NO\uparrow+2H_{2}O\)(根据给出的后续反应推测铋与稀硝酸反应的可能方程式),现象未明确提及,可能有气体产生等现象。 5. **金属与水反应(以金属钾与水反应为例,虽然未明确要求,但属于金属与溶液相关反应类型)** - 金属钾与水反应:\(2K + 2H_{2}O = 2KOH+H_{2}\uparrow\),现象是反应剧烈,可能有燃烧、爆炸等危险现象(因为反应放出大量热和氢气)。 <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>
1. * * Reaction equation and analysis of material properties ** - The composition of the water was complex. It contained Cl2, Cl2, and HClO. When the solution of Na2CO3 was mixed with water, the first reaction was: Cl2 + 2Na2CO3 + H2O = NaClO + NaClO +2NaHCO3. - Because of the participation of the Cl2 in the reaction, the yellowish-green color of the Cl2 water would gradually fade. - Gas was generated during the reaction because of the formation of CO2 (When the amount of Cl-water was excessive, the subsequent formation of Cl-and-NaHCO3 reacted with each other), so bubbles were observed. 2. * * Analysis of the change in the acidic and acidic properties of the solution ** - The solution of soda ash was basic. As the water was added, the reaction formed substances such as NaClO, NaHCO3, and so on. The basicity of the solution gradually weakened. - When there is an excess of Cl-water, the solution will eventually become acidic due to the large amount of Cl-water. 3. * * Impact analysis of hypochloric acid ** - Hypochloric acid has strong oxidisation and bleachability, but in this reaction system, the main reaction phenomenon is still determined by the reaction between Cl2 and Na2CO3 and the subsequent reaction between Cl2 and Na2HCO3. The effect of hypochloric acid is not obvious on the phenomenon, but mainly on the chemical properties of the solution. For example, it will produce an oxidisation effect on some reducing substances in the solution. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
When aluminum reacted with the acid, a silver-white solid would be produced. Because the metal activity of the acid was after that of aluminum, aluminum would replace the acid from the salt solution. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
There is no chemical reaction between the two of them. In terms of chemical principles, the conditions for the metathesis reaction to occur were the formation of precipitations, gases, or water. The mixture of the two did not meet the conditions for the metathesis reaction to occur, so there would be no reaction. Therefore, there was no reaction equation, reaction phenomenon, and phenomenon analysis. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
First, the reaction between the water and the salt would be observed. The salt would float on the surface of the water and melt into a silver-white ball. It would swim around on the surface of the water, accompanied by a sizzling sound. The reaction would produce hydrogen gas and then the reaction between the aluminum and the solution of the salt and water would produce hydrogen gas. The total reaction was the reaction of aluminum and water to produce meta-aluminum aluminum and hydrogen. There was a phenomenon of hydrogen formation during the reaction. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
It was too general to say that it was a phenomenon caused by the reaction of colorless solution with sulfuric acid. You have to tell me what is in this colorless solution. Is it a salt solution, an alkali-based solution, or something special? Otherwise, I can't be sure what will happen. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
According to the order of metal activity, copper (Cu) is more active than silver (AG). Theoretically, a substitution reaction will occur: The reaction phenomenon should be that the red copper gradually dissolved, and at the same time, a silver-white metal was formed on the surface of the copper, and the solution turned from colorless to blue. This was because copper replaced silver from its compound, and the resulting copper sulfuric acid solution was blue, while silver was a silver-white metal. However, because silver sulfuric acid (Ag2 SO2) is slightly dissolved in water, the reaction may proceed relatively slowly. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The reaction of the reaction between the two metals was as follows: Mn + H ^SO2 = Mn ^SO2 + H ^^; the reaction of the reaction between the two metals was as follows: Mn + 2 ^H ^SO2 = Mn ^SO2 + 2 ^H ^O + Mn ^. If there is an excessive amount of copper, it will first occur as: Mn +2H ^SO2 (concentrated)= Mn ^SO2 + Mn ^O, and then as: Mn + H ^SO2 (diluted)= Mn ^SO2 + Mn ^O. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>