Reaction curve of metal and salt solution
1. ** Solid mass change curve ** - In the replacement reaction between metal and salt solution, the change in solid mass depended on the relative atomic mass of the metal before and after the reaction. For example, the reaction between a piece of copper and a solution of copper sulfuric acid,[Z + CuSO4 = ZnSO4 + CuZ], the relative atomic mass of the piece of copper is 65, and the relative atomic mass of the piece of copper is 64. During the reaction, the solid mass changed from 65 to 64, so the solid mass decreased. After the reaction ended, the solid mass no longer changed. In the curve, the solid mass decreased at the beginning and became flat after the reaction ended. - When the copper plate reacted with the silver nitrates solution, the relative atomic mass of copper was 64, and the relative atomic mass of silver was 108 (the reaction produced two silver atoms, which meant that the solid mass increased from 64 to 216. The solid mass did not change after the reaction ended, but increased at the beginning of the curve and remained unchanged after the reaction ended. 2. ** Solution quality change curve ** - For the reaction between the copper solution and the copper sheet, the solute changed from CuSO4 to CuSO4, and the solute mass changed from 160 to 161. The mass of the solution remained unchanged, but the mass of the solution increased. After the reaction, the mass of the solution remained unchanged. At the beginning of the curve, the mass of the solution increased, and after the reaction, the mass of the solution became flat. - In the reaction between copper sheet and silver nitrates, the solute changed from AgNO3 to Cu(NO3) 2, and the solute mass changed from 340 to 188. The mass of the solution decreased while the mass of the solution remained unchanged. After the reaction, the mass of the solution remained unchanged. At the beginning of the curve, the mass of the solution decreased and remained unchanged after the reaction. 3. ** Main Points of Analysis ** - "Look at the coordinates: The meaning of the abyssal and ordinate coordinates is clear. For example, the abyssal coordinate may indicate the reaction time or the amount of metal added, and the ordinate may indicate the solid mass, solution mass, and so on. - Look at the starting point: When the independent variable (such as the reaction time is 0), the starting point of the image reflects the state before the reaction begins. - Looking at the trend: As the independent variable increases (such as the reaction), the change trend of the function value (such as the solid mass or solution mass). - Looking at the turning point: refers to the point where the trend changes, such as the starting point or the end point of the reaction. The turning point can help determine when the reaction begins and when it ends. Read more exciting novels for free
Reaction equation and phenomenon of solution and metal
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>
What is the reaction equation of solution and metal?
The reaction equation between a solution and a metal used chemical symbols and chemical formulas to represent the chemical reaction between the solution and the metal. It described the process of transforming the reagents (solute and metal in the solution) into products. It followed the law of conservation of mass, which meant that the type and number of atoms would not change in a chemical reaction. For example, in the chemical equation,[2Na +2H ^O = 2Na +2H ^O + H ^^], it means that the metal, Na, will react with water to form Na ions, Ox ions, and hydrogen. The reaction equation not only indicated what the reagents and products were, but it could also express the ratio of the number of particles (the ratio of the number of molecules or atoms) between the substances through the stoichiometric-number (the coefficient in the equation). At the same time, the mass relationship between the reagents and products could be determined according to the relative atomic mass or relative molecular mass. This helped to predict the outcome of the reaction, calculate the amount of reagents and products, and understand the nature of the reaction. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Experimental Report on the Reaction of Metal and Compound Solution
The following is an example of an experimental report on the reaction of a metal and a compound solution: ** 1. Purpose of the experiment ** 1. To explore the law of the reaction between metals and compound solutions. 2. Comparing the order of activity of different metals. ** 2. Experiment Principle ** The more active metal could replace the less active metal from its compound solution. By observing the reaction phenomenon (such as whether there is a new metal separation, the color change of the solution, etc.) to determine whether the reaction occurred, and then determine the order of metal activity. ** 3. Laboratory supplies ** 1. ** Instrument **: Test tube, test tube rack, tweezers, etc. 2. ** Pharmaceuticals **: aluminum sheet, iron sheet, copper sheet, copper sulfuric acid solution, aluminum sulfuric acid solution, silver nitrates solution, etc. ** 4. Experimental Steps ** 1. Reaction of aluminum and copper sulfuric acid solution - He took a test tube and added a suitable amount of copper sulfuric acid solution. - He used a pair of tweezers to pick up a piece of aluminum and put it into the copper sulfuric acid solution. - Observation: There is a red substance on the surface of the aluminum sheet, and the color of the solution gradually lightens. The reaction equation is: 2AI + 3CuSO = Al2 (SO)+ 3Cu. 2. Reaction of iron and copper sulfuric acid solution - He took out another test tube and added the copper sulfuric acid solution. - He used a pair of tweezers to pick up a piece of iron and put it into the solution. - Red substances were observed on the surface of the iron sheet, and the color of the solution became lighter. The reaction equation was: FeSO2 + CuSO2 = FeSO2 + Cu2. 3. Reaction of Copper with Aluminium-Sulphate Solution - He took out a test tube and added the solution. - He placed a piece of copper. - Observed phenomenon: No obvious phenomenon, indicating that copper cannot replace the aluminum in the aluminum sulfuric acid solution, and the mobility of copper is weaker than that of aluminum. 4. Reaction of Copper with Silver Nitrate Solution - He took out a test tube and added the silver nitrates solution. - Put in the copper plate. - A silver-white substance was seen on the surface of the copper plate, and the color of the solution changed. The reaction equation was: Cu + 2AgNO = Cu(NO) 2 + 2AG. ** 5. Experimental results and analysis ** 1. Through the reaction between aluminum and copper sulfuric acid solution, and the reaction between iron and copper sulfuric acid solution, it could be seen that aluminum and iron were more mobile than copper. 2. Copper did not react with the aluminum sulfuric acid solution, further indicating that the mobility of aluminum was stronger than copper. 3. Copper reacted with silver nitrates, which meant that copper was more mobile than silver. Based on the above experimental results, the order of metal activity was as follows: Al > Cu > Ag, Fe > Cu> ** 6. Experiment conclusion ** 1. The order of metal activity affects the reaction between the metal and the compound solution. The more active metal can replace the less active metal. 2. When describing the reaction phenomenon between metal and metal compound solution, it was necessary to pay attention to the attachment of new metal to the surface of the original metal and the change in color of the solution. 3. This kind of reaction must be carried out in a solution. The metal compound must be water-dissolved, and the metal compound that is not water-dissolved generally does not react with the metal. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the solution reaction equation of salt and alcohol mixture?
Under normal conditions, salt (mainly composed of salt) and alcohol (mainly composed of alcohol) would not react together. There was no solution reaction equation. However, in theory, the reaction of NaCl2 + CH CH2 </anno> OH could produce Na ethanate and sulfuric acid, but this was only a theoretical situation. In reality, it would not react under normal conditions. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction equation of saturated salt solution on the negative pole
When the saturated salt solution was electrolysed, the hydrogen ions on the negative pole obtained electrons to generate hydrogen. The reaction equation was: 2H +2e = H ^. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Experimental Phenomenon of the Reaction between Metal and Compound Solution
When a metal reacted with a compound solution, the following experimental phenomena occurred: 1. For the reaction between metal and metal compound solution: - A more active metal can replace a less active metal from its compound solution. For example, both aluminum and iron could react with a copper sulfuric acid solution. There were two points to note when describing this reaction phenomenon. One was that the replaced metal adhered to the surface of the original metal. For example, if the iron wire was immersed in the copper sulfuric acid solution, the surface of the iron nail immersed in the solution would be covered with a red substance (copper); if the aluminum wire was immersed in the copper sulfuric acid solution, the surface of the aluminum wire immersed in the solution would be covered with a layer of purple-red substance (copper). The second was that the color of the solution would change. For example, when iron reacted with copper sulfuric acid, the solution would gradually turn from blue to light green. This was because the reaction of [FeCuSO4 = CuFeSO4] had occurred, and the resulting solution of iron sulfuric acid was light green. 2. For the reaction between metals and acid solutions, metals such as titanium, aluminum, and iron could react with sulfuric acid and dilute sulfuric acid. The intensity of the reaction was different, and the order of activity of these metals could be judged by this. However, this was not a typical phenomenon of the reaction between metals and compound solutions. 3. In the reaction of a metal with multiple salt solutions (For example, when a certain amount of Mn powder is added to the mixed solution of [Al1 (NO3) 3],[Cu2 (NO3) 2], and [AgNO3], there will be a filter residue (metal) and a filtered liquid after the reaction.) However, this was mainly the result of the reaction. The phenomenon in the reaction process still followed the law of the reaction between the metal and the metal compound solution, such as the replacement metal attaching to the original metal surface, the color change of the solution, and so on. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction of the solution with the solution
There were different opinions on whether or not the reaction between the two substances occurred. One view was that silver chloride-soda would react to produce silver-white silver silver precipitations and NaCl2, and the silver-white precipitations could easily be converted to brown silver oxide-soda. The other view was that the reaction could not be carried out because the reaction between base and salt required the salt to be dissolved, while AgCl2 was difficult to dissolve. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the change in the image of the reaction between metal and acid, base and salt
1. ** Reaction of metal and acid (horizontal coordinate is reaction time, vertical coordinate is hydrogen mass)** - In terms of reaction speed, the greater the slope, the faster the reaction speed. The order of metal activity can be determined according to the inclination of the curve. The greater the inclination, the stronger the metal activity. - In terms of hydrogen production: - When the metal is in excess and the acid (of the same concentration) is insufficient, the quality of the hydrogen produced is determined by the quality of the acid. At this time, the quality of the hydrogen produced by different metals is equal. - When the acid (with the same concentration) is sufficient, the quality of the generated hydrogen is determined by the quality of the metal, and the relationship is as follows: 2. ** Reaction between metal and acid (x-axis is the mass of acid, y-axis is the mass of hydrogen)** - The situation was different in different areas: - When 0 < m <a (excessive or just complete reaction, iron, magnetism, and aluminum are all excessive), the quality of the generated hydrogen has a specific situation (it needs to be judged according to the specific reaction data, such as the chemical relationship between the metal and the acid reaction). - When a < m <b (insufficient amount of iron, excessive amount of iron or just complete reaction, excessive amount of aluminum and aluminum), the quality of the generated hydrogen gas also has a corresponding situation (also needs to be judged according to the specific conditions of the reaction). - When b < m <c (there is insufficient iron and iron, excessive or just complete reaction of aluminum), the quality of hydrogen produced also has a corresponding situation. 3. ** Reaction between metal and acid (x-axis is the mass of metal, y-axis is the mass of hydrogen)** - At the beginning of the reaction, the metal was insufficient and the acid was excessive. The quality of the hydrogen produced was determined by the metal. - As the metal continued to increase, the amount of metal would not be enough, and the quality of the hydrogen produced would be determined by the acid. 4. ** Reaction between metal and salt solution (Take the reaction between a piece of metal and a solution of copper sulfuric acid as an example, from the perspective of solid and solution quality)** - Solid mass change: During the reaction, the solid mass changes from 65 (relative atomic mass of copper) to 64 (relative atomic mass of copper). The solid mass decreases. After the reaction, the solid mass remains unchanged. - Change of solution mass: The solute mass changes from 160 (relative molecular mass of copper sulfuric acid) to 161 (relative molecular mass of sulfuric acid). The mass of the solution increases while the mass of the solution remains unchanged. After the reaction, the mass of the solution remains unchanged. 5. ** Reaction between metal and salt solution (Take the reaction between copper sheet and silver nitrates solution as an example, from the perspective of solid and solution quality)** - Solid mass change: The mass of the solid changes from 64 to 216 (the relative atomic mass of silver). The mass of the solid increases. After the reaction, the mass of the solid remains unchanged. - Change of solution mass: The solute mass changed from 340 (relative molecular mass of silver nitrates) to 188 (relative molecular mass of copper nitrates). The mass of the solution decreased while the mass of the solution remained unchanged. After the reaction, the mass of the solution remained unchanged. In short, the image change of the reaction between metal and acid, base, and salt involved many factors such as the reaction rate and the quality of the resulting substance. It was closely related to the activity of the metal and the amount of the reagent (the amount of metal and acid or salt solution). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The Essence of the Reaction of Salt and Salt
氯化铵与氢氧化镁反应的实质可从以下方面分析。氯化铵是强酸弱碱盐，在水中发生水解产生氢离子，即\(NH_{4}^{+}+H_{2}O = NH_{3}\cdot H_{2}O + H^{+}\)。氢氧化镁难溶于水，但氢离子能与氢氧化镁中的氢氧根离子反应，即\(Mg(OH)_{2}+2H^{+}=Mg^{2 + }+2H_{2}O\)，从而促使氢氧化镁溶解。 从另一个角度看，这一反应也可理解为氢氧化镁沉淀能溶解于铵盐中。因为铵盐（如氯化铵）存在时，铵根离子与氢氧根离子结合，使氢氧根离子浓度降低，例如\(MgCl_{2}+2NH_{4}OH \rightleftharpoons 2NH_{4}Cl + Mg(OH)_{2}\downarrow\)这个可逆反应，当氯化铵大量存在时，平衡向左移动，沉淀溶解。此外，该反应也有气体生成推动反应进行的因素。 <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>
Why do you need a saturated salt solution to heat up the reaction?
During the heating process of the saturated salt solution, as the water evaporated, the concentration of the solution continued to increase (when it exceeded the saturated concentration). The free energy of the solution was higher than the free energy of the crystal, and the solution spontaneously changed towards the crystal, thus the solute crystallized. This was from the perspective of free energy change. In addition, in industrial salt production, such as seawater salt, the saturated salt solution after the preparation of the salt was introduced into the crystallization area to continue to be exposed to the sun. The water was evaporated by heating, and the salt crystals were separated. This was a common situation where the saturated salt solution was heated to obtain salt crystals. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>