The Image Problem of the Reaction of Metal and Acid
In the image problem of the reaction of metals with excessive acid, the following situations were mainly involved: ##1. The horizontal coordinate is reaction time. 1. ** Reaction Rate Relationship ** - When different metals react with excess acid, the reaction rate depends on the mobility of the metal. In the middle school chemistry exam, the metal activity was in the order of Mn> Mn. This meant that under the same conditions (such as the same concentration of acid, the same temperature, the size of the metal particles, etc.), the reaction rate from fast to slow was also: Mn> Mn. The image showed the degree of inclination of the diagonal line. The greater the inclination, the faster the reaction speed. 2. ** The final mass of hydrogen produced ** - When the same amount of different metals react with an excess of acid, the mass of hydrogen produced is related to the relative atomic mass of the metal (when the metal has the same valency). According to the chemical equation, the mass relationship of hydrogen produced by the reaction of a metal of the same mass with a sufficient amount of acid was as follows: The higher the platform, the greater the mass of hydrogen produced. ##2. The horizontal coordinate is the mass of the acid. 1. ** Reaction process analysis ** - In the process of increasing the mass of acid, the metal will react completely because there is a small amount of metal (acid excess). The quality of the corresponding acid after the reaction of different metals was different, and the quality of the hydrogen produced was also different. 2. ** Phased analysis of the quality of hydrogen produced ** - At different stages, depending on the activity and relative atomic mass of the metal, there would be different situations where the metal was in excess or completely reacted, which would affect the amount of hydrogen produced. For example, in a certain interval, there may be excessive or complete reaction of the iron, the aluminum, and the aluminum. At this time, the quality of the generated hydrogen would have a specific situation. As the acid quality increased, when entering the next interval, there may be insufficient amount of the iron, or the iron may be excessive or complete reaction. The aluminum and the aluminum may be excessive, and the quality of the hydrogen would change accordingly. ##3. Key Points 1. ** Judging excessive and small amount ** - First of all, he had to judge the excessive and small amount of metal and acid through the description in the question. For example, he could see the words "small amount","sufficient amount","excessive amount", etc. The final amount of hydrogen produced in the reaction was determined by the small amount of the reagent. 2. ** Explain the meaning of the horizontal and vertical coordinates ** - When analyzing the image, it was necessary to distinguish the specific meaning of the horizontal and vertical coordinates in the image. Generally, the vertical coordinate was the amount of hydrogen produced, and the horizontal coordinate might be the reaction time, the mass of acid consumed, or the mass of metal consumed. Read more exciting novels for free
Image of the reaction of the same amount of metal and acid
1. ** Reaction of the same amount of metal with sufficient acid (horizontal coordinate is reaction time)** - Reaction rate relationship: When the same mass of Mn, and Mn react with a sufficient amount of the same acid of the same mass and concentration, the reaction rate relationship is: Mn> Mn. This was because under the conditions of a certain temperature, metal particle size, and solute mass fraction of the diluted acid solution, the stronger the mobility of the metal, the faster the reaction to produce hydrogen. - The mass relationship of the final hydrogen produced: The mass relationship of the final hydrogen produced is: 2. ** Reaction of the same amount of metal with sufficient acid (the horizontal coordinate is the mass of acid)** - When the same mass of Mn, and Mn reacted with a sufficient amount of sulfuric acid of the same mass and concentration, and the metals completely reacted, the mass relationship of the final hydrogen produced was: Mn> Mn. 3. ** Reaction of an equal amount of acid with a sufficient amount of metal (horizontal coordinate is reaction time)** - Reaction rate relationship: When the same acid with the same mass and concentration and sufficient amount of Mn, and Mn react sufficiently, the reaction rate relationship of hydrogen is: Mn> Mn. - The mass relationship of the final hydrogen produced: The mass relationship of the final hydrogen produced is: 4. ** Reaction of an equal amount of acid with a sufficient amount of metal (the horizontal coordinate is the mass of the metal)** - The mass relationship of the final hydrogen produced: When the same acid with the same mass and concentration and a sufficient amount of Mn, and Mn react sufficiently, the mass relationship of the final hydrogen produced is: Mn = Mn. When analyzing the image problem of the reaction between metal and acid, it was necessary to pay attention to the specific meaning of the ordinate and ordinate in the image. Generally, the ordinate was the amount of hydrogen produced, and the ordinate was usually time/s or the mass of acid consumed/g or the mass of metal consumed/g. At the same time, it was necessary to judge the amount of metal and acid. The amount of hydrogen produced in the reaction was determined by the amount of acid in the reaction. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Acid and Metal Reaction Color
Different metals may react with acid to produce different colors: - The reaction between the dilute sulfuric acid and the dilute sulfuric acid produced a large number of bubbles. The chemical equation was: Mn +2HQ = Mn Cl2 + Mn Cl2, Mn + Mn Cl2 = Mn Cl2 + Mn Cl2 + Mn - The reaction between the two metals was intense and produced a large number of bubbles. The chemical equation was as follows: Mn +2HQ = Mn Cl2 + Mn Cl2, Mn + Mn Cl2 = Mn Cl2 + Mn Cl2 + Mn Cl2 = Mn Cl2 + Mn Cl2 = Mn Cl2 + Mn Cl2 + Mn Cl2 = Mn Cl2 + Mn Cl2 = Mn Cl2 + Mn Cl2 + Mn Cl2 = Mn Cl - When iron reacted with diluted sulfuric acid or sulfuric acid, a small amount of bubbles appeared on the surface of the nail. At the same time, the solution turned light green because of the formation of iron sulfuric acid or iron chloride.The reaction equation was: FeCl2 <2>+ H <2>, FeCl2 <2>= FeCl2 <2>+ H <2>, FeCl2 <2>= FeCl2 <2>= FeCl2 <2>+ H <2>. - Copper does not react with dilute sulfuric acid or dilute sulfuric acid. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Law of Nitric Acid with Metal and Nonmetal
1. ** Reaction law of nitrates and metals ** - ** Passivation phenomenon **: Metal such as iron, aluminum, and aluminum are easily dissolved in dilute sulfuric acid, but they are not dissolved in cold concentrated sulfuric acid. This is due to the occurrence of a passive phenomenon. - ** Reaction with non-active metals ** - When the metal activity order table showed that the metal reacted with the metal after hydrogen, it could be seen that the metal was first oxided by the acid, and then the metal reacted with the acid to form nitrates. The main reduction product of concentrated sulfuric acid was NO2, and the main reduction product of diluted sulfuric acid was NO. For example, the reaction of silver with concentrated sulfuric acid: <2Ag +2HNO3 (concentrated)= Ag2O +2NO2 + H2O>,<Ag2O +2HNO3 = 2AgNO3 + H2O>, the total reaction is <2Ag +2HNO3 (concentrated)= AgNO3 + NO2 + H2O>; The reaction of silver with diluted sulfuric acid: <3Ag +4HNO3 (diluted)= 3AgNO3 +NO +2H2O>. - ** Reaction with active metals **: When sulfuric acid acts with the metal before hydrogen in the metal activity order table, in addition to the corresponding nitrates, the sulfuric acid may be further reduced to substances such as <anno data-annotation-id ="00000000 - 4000 - 4000 - 4000 - 8000 - 9000000000"></anno>,</anno>, and </anno>. In general, active metals react with concentrated sulfuric acid to form <anno data-annotation-id ="00000000 - 4000 - 4000 - 8000 - 8000 - 90000000000"> NO2 </anno>, dilute sulfuric acid to form <anno data-annotation-id ="0000000 - 4000 - 4000 - 9000 - 900000000000"> NO </anno>, and extremely dilute sulfuric acid to form <anno data-annotation-id ="20000a000000 - 90000000000"></anno></anno></anno>. For example, the reaction of calcium with different concentration of sulfuric acid: - \(Mg + 4HNO_3(16mol/L)=Mg(NO_3)_2+2NO_2↑+2H_2O\) - \(3Mg + 8HNO_3(6mol/L)=3Mg(NO_3)_2+2NO↑+4H_2O\) - \(4Mg + 10HNO_3(2mol/L)=4Mg(NO_3)_2+N_2O↑+5H_2O\) - \(4Mg + 10HNO_3(1mol/L)=4Mg(NO_3)_2+NH_4NO_3+3H_2O\) - \(5Mg + 12HNO_3(0.5mol/L)=5Mg(NO_3)_2+N_2↑+6H_2O\)。Moreover, the thinner the sulfuric acid was, the lower the valency of the nitrogen in the reduction product. However, it could not be mistaken that the dilute sulfuric acid had a stronger oxidisation ability than the concentrated sulfuric acid. In fact, the more concentrated the sulfuric acid was, the stronger the oxidisation ability was. - ** Special Metal Reaction **: Metal such as tin, stibine, and tungsten do not have much effect on nitrates. They may form an oxide-like substance that is not dissolved in nitrates, but they cannot form nitrates. 2. ** Reaction law of sulfuric acid and non-metals **: When sulfuric acid and non-metals react, it only shows the oxidisation property. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Formula of Metal Oxides and Dilute Sulfuric Acid
金属氧化物和稀硫酸反应会生成水和金属硫酸盐。例如： 1. 氧化镁与稀硫酸反应：\(MgO + H_{2}SO_{4} = MgSO_{4}+H_{2}O\)。 2. 氧化铁与稀硫酸反应：\(Fe_{2}O_{3}+3H_{2}SO_{4}=Fe_{2}(SO_{4})_{3}+3H_{2}O\)。 <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>
Reaction of Cyclohexylbenzen and Acid Permanganate?
Cyclohexyl-benz-lene reacted with acidic potassium permanganate. Cyclohexylbenzen was a homolog of benzen. When the carbon atom on the benzen ring had hydrogen, it could be oxided by the solution of potassium permanganate. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction of Barium Cyanate and Acid
The reaction between Ba(Ce) 2 and sulfuric acid (HQ) will produce hydrogen cyanide (HQ) gas. The reaction equation is Ba(Ce) 2 + 2HQ = BaCl2 + 2HQ. Barium cyanide is an extremely toxic substance. When exposed to high heat or acid, it will produce a highly toxic cyanide gas. When operating a reaction involving potassium cyanide, safety regulations must be strictly adhered to. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction of Gadolinium Trioxideand Sulfuric Acid
Gadolinium reacted with oxygen to form Gadolinium trioxide.Gadolinium was a rare earth element, and Gadolinium trioxidewas a basic oxide.Alkaline oxidecould usually react with acid to form salt and water, so Gadolinium trioxidereacted with sulfuric acid to form Gadolinium Sulphate and water. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Ascorbic acid browning reaction example
Ascorbic acid browning reaction was a non-alcoholic browning reaction. For example, during the fermentation process of apple-pear, the color difference value, Delta E, first increased and then decreased, and the L* value first decreased and then increased. These color changes were related to browning. During the fermentation process, factors such as the change in the content of Ascorbic acid may cause browning reaction. In fruits such as apples, bananas, and avocados that are cut open, browning will occur due to oxidization.(For example, in lemon juice, the content of Ascorbic acid can help to slow down the browning process caused by oxygen. This indirectly reflects that Ascorbic acid is involved in the browning reaction mechanism in this process. If the content of Ascorbic acid is not appropriate, it may lead to browning reaction. For example, in the browning process of plant tissues such as lily, if external environmental factors affect the balance of the reaction system related to Ascorbic acid, browning reaction may occur. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Why can't the reaction of the sulfuric acid react with the sulfuric acid?
The reaction equation is: NaH + CH30H → CH3ONa +H2O. This reaction was a strongly irreversible reaction. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What else can the reaction of sulfuric acid and sulfuric acid do?
The reaction of the two could be used in the laboratory to produce nitrogen.((NH4) 2SO4 + 2NaOx = 2NH3 ^+ Na2SO4 + 2H2O), the nitrogen gas can be used for many purposes, such as the catalyst of the nitrogen dioxide.(4NH3 + 5O2 = 4NO +6H2O) and other reactions;<(NH4) 2SO4>> can be used for double decomposition reaction with table salt to produce aminium chlorideand react with aluminum sulfuric acid to produce aminium aluminum. It can be used together with Boric acid to produce fire-resistant materials. Adding it to plating solution can increase the electrical conductivity. It is also a catalyst for food maroon color. It is also a nitrogen source for cultivating yeast in the production of fresh yeast. It is also used for dyeing auxiliary agents for acid dye and leather deashing agent. It is also used in beer brewing, chemical reagents, and battery production. There were also applications such as mining rare earths (about 5 tons of lithium sulfuric acid was needed for each ton of rare earth ore), and so on. The use of lithium sulfuric acid could be used to make soap, improve soil (improve soil with lime powder, and use organic fertilizers such as lithium sulfuric acid and lithium chlorideto alkalize the soil), etc. After the two reacted, they could play a certain role in these related industrial production or reaction processes. For example, in the production process with the participation of lithium sulfuric acid, if the reaction needed to participate in the reaction, the reaction of lithium sulfuric acid and lithium sulfuric acid could be used to produce lithium sulfuric acid. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>