In the common metal activity order of K, Ca2, Na2, Al2, Fe3, Sn3, Pb3,(H), Cu3, Hg3, Ag3, Pt3, Au4, the metal after hydrogen cannot react with dilute sulfuric acid. For example, metals such as gold, silver, and copper could not react with dilute sulfuric acid because they were less active than hydrogen and could not replace the hydrogen in dilute sulfuric acid. Read more exciting novels for free
In general experiments or normal operating environments, the reaction between iron powder and diluted sulfuric acid was not particularly dangerous. From the reaction process, the reaction between iron powder and diluted sulfuric acid would produce hydrogen and iron dioxide. The reaction formula is: FeCl2 + H2. When hydrogen met an open flame in the air, it would burn or even explode. However, this reaction was usually carried out in an open container. The hydrogen would quickly spread into the air. As long as it was far away from the source of the open flame, it would not cause an explosion. During the operation, if it was carried out according to the chemical experiment specifications, such as operating in a well-vented environment to avoid acid splashing (by slowly adding iron powder to avoid the reaction being too intense and causing acid splashing), this reaction was relatively safe. However, if the reaction was carried out in large quantities in a closed space, there might be a risk of explosion if the hydrogen gas continued to accumulate. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
When iron reacted with diluted sulfuric acid, the solution would turn from colorless to light green. This was because iron and diluted sulfuric acid had a replacement reaction. The chemical equation was: FeCl2 + H2. The reaction produced iron dioxide (FeCl2), which made the solution appear light green. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
When iron reacted with diluted sulfuric acid, bubbles would be produced. The chemical equation of the reaction between iron and diluted sulfuric acid was: FeCl2 + H2. This reaction was a replacement reaction. The reaction between iron and sulfuric acid replaced hydrogen, which was produced in the form of bubbles. At the same time, the solution gradually turned light green and the iron gradually dissolved. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The reaction between the alcoholic group and the solution was an alkali-base reaction, which was accompanied by the protonation of the alcoholic group and the deprotonation of the solution. In the reaction, the hydrogen atom in the alcoholic group was replaced by the alcoholic group in the sulfuric acid, forming water and a positively charged ion. At the same time, the negative ion in the sulfuric acid combined with the positively charged ion in the alcoholic group to form a salt. The reaction equation was: <<p>><p></p>><p></p>><p><p>><p><p>><p><p>><p><p>><<p>><p> p>><p>> p> p>>& gt In general, because the alcoholic group was weakly acidic, it could react with the strong base, namely, soda. It did not require any special reaction conditions and could react at any time. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
1. 铁与浓硝酸反应: - 常温下铁在浓硝酸中会钝化,不反应。 - 加热时,若铁少量:\(Fe + 6HNO_{3}(浓)=\triangle=Fe(NO_{3})_{3}+3NO_{2}\uparrow+3H_{2}O\); - 若铁过量:\(Fe + 4HNO_{3}(浓)=\triangle=Fe(NO_{3})_{2}+2NO_{2}\uparrow+2H_{2}O\)。 2. 铁与稀硝酸反应: - 若铁少量:\(Fe + 4HNO_{3}(稀)=Fe(NO_{3})_{3}+NO\uparrow+2H_{2}O\); - 若铁过量:\(3Fe + 8HNO_{3}(稀)=3Fe(NO_{3})_{2}+2NO\uparrow+4H_{2}O\)。 <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>
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>
Taking the reaction of copper and sulfuric acid as an example, the reaction equation of concentrated sulfuric acid is: Cu +4HNO2 (concentrated) = Cu(NO2) 2 + 2NO2 ^+2H ^O, and the reduction product is NO2; The reaction equation of diluted sulfuric acid is: 3Cu +8HNO2 (diluted) = 3Cu(NO2) 2 + 2NO2 ^+4H ^O, and the reduction product is NO. The stronger the concentration of the acid, the stronger the ability to catalyze. This was reflected in the different reaction products. For example, the chemical equation of the reaction between concentrated sulfuric acid and carbon is: C+4HNO (concentrated) = CO2 ^+4NO2 ^+2H O; When dilute sulfuric acid and sulfur react, only S2 ions can be oxided into elemental sulfur, while when concentrated sulfuric acid and sulfur react, S2 ions can be further oxided into SO2 ions, such as 3dsS + 8HNO (diluted) = 3Cadr (NO2) 2 + 2NO2 ^+4H O + 3S. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The reaction rate of concentrated sulfuric acid with copper was faster than that of diluted sulfuric acid with copper. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
When iron reacted with the mixed solution of sulfuric acid and copper sulfuric acid, there was no problem of who reacted with iron first. This was because sulfuric acid and copper sulfuric acid were uniform solutions, and it was impossible to determine which iron would come into contact with first. This kind of mixture reaction was a competitive reaction. The iron would react with whichever ion it came into contact with first. Although Cu2 was more oxidisable than H, hydrogen could not reduce Cu2 in the water solution, so there was no order. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Silicate and sulfuric acid had to contain either calcium or calcium for the reaction to occur. At this time, the reaction produces CaSiO2 or BaSiO2, the equation is: CaSiO2 + H ^SO2 = CaSO2 + H ^SiO2, BaSiO2 + H ^SO2 = BaSO2 + H ^SiO2. This was because the metathesis reaction between salt and acid required the new salt in the product to be a deposit before the metathesis reaction could occur. Silicic acid was hardly dissolved in water, and it was an acid that was weaker than sulfuric acid. According to the periodic law of the elements, carbon and silicon were in the same main group, and the atomic number of silicon was larger. The non-metallic nature of silicon was weaker than carbon, so the acidic property of sulfuric acid was weaker than that of sulfuric acid. Therefore, under normal circumstances, it was not easy to react with sulfuric acid. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>