What does the reaction of excess iron and concentrated sulfuric acid mean?
The reaction between excess iron and concentrated sulfuric acid meant that the amount of iron was sufficient for concentrated sulfuric acid. From the nature of the reaction, iron and concentrated sulfuric acid would undergo a "passive" phenomenon at room temperature, that is, a dense oxide-film formed on the iron surface to prevent the reaction from proceeding further. However, the reaction could continue under heating and other conditions. When iron reacted with concentrated sulfuric acid, as the amount of iron increased (in excess), more iron would participate in the reaction. Iron reacted with concentrated sulfuric acid to produce products such as iron nitrates. If there was an excess of iron, the excess iron would further react with the generated iron nitrates to reduce the iron nitrates. The final product might contain both iron nitrates and iron nitrates. In addition, there would also be nitrogen dioxide gas produced during the reaction of iron and concentrated sulfuric acid. The reaction situation was relatively complicated and involved the process of oxido-reduction reaction. The valency of the iron element would change during the reaction. The chemical valency of the nitrogen element in the sulfuric acid would also change. Read more exciting novels for free
Reaction equation and phenomenon of excess iron and concentrated sulfuric acid
Iron reacted with concentrated sulfuric acid. If there was an excess of concentrated sulfuric acid, the reaction equation was: Fe6 HNO2 (concentrated)= heating = Fe3 (NO2)+3NO2 ^+3H2 O. If there is an excess of iron, the reaction equation is: Fe4 HNO2 (concentrated)= heating = Fe2 (NO2) 2 + 2NO2 2 + 2H2 O. [Phenomenon: The reaction produces reddish-brown gas (NO <2>), and the iron is gradually dissolved.] At the same time, the color of the solution may vary according to the relative amount of iron and sulfuric acid and the degree of reaction. If the solution is formed, it may be brownish-yellow, and if the solution is formed, it may be light green. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction equation of concentrated and diluted sulfuric acid with iron
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>
identification method for reaction of concentrated sulfuric acid and sulfuric acid
Acetic anhydryride-concentrated sulfuric acid reaction (Liebermann-Burchard reaction) can be used to identify tripenoid and steroid side. The specific identification method was as follows: dissolve the sample in vinegar and add concentrated sulfuric acid-vinegar (1:20). If the final color was red or purple, it was triterpene soap. If the final color was blue-green, it was steroid soap. During the reaction process, color changes such as red → purple → blue → green → dirty green would occur in turn, and finally the color would fade. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Phenomenal equation of heating reaction between iron and concentrated sulfuric acid
The chemical equation for the reaction between iron and concentrated sulfuric acid is: Fe6HNO2 (concentrated)= heating = FeNO2 + 3NO2 + 3H2O. The reaction phenomenon was that reddish-brown gas (NO <2>) was produced and the iron gradually dissolved. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the reaction between excessive concentrated sulfuric acid and iron heating?
When excess concentrated sulfuric acid and iron are heated, the reaction equation is: Fe4HNO3 (concentrated)=== Fe2NO2 + 2H2O. The reaction phenomenon was that reddish-brown gas (NO2) was produced, and the iron gradually dissolved. This was an oxido-reduction reaction. In this reaction, the valency of iron increased from 0 to +2, showing reduction, while the valency of nitrogen in the sulfuric acid decreased from +5 to +4, showing oxidisation. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The reaction between the polythene and the concentrated sulfuric acid
At room temperature, concentrated sulfuric acid would have a slow corrosive effect on the polythene, and at 90 - 100 ° C, concentrated sulfuric acid would rapidly erode the polythene, causing it to be destroyed or decomposed. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the reaction of heating concentrated sulfuric acid with Butanol?
Since the carbon-oxygen bond of Butanol was a polar bond, the electron negativity of the oxygen atom was greater than that of the carbon atom, so the carbon-oxygen bond was easy to break and an elimination reaction occurred. For example, the elimination reaction of 1-Butanol under the effect of concentrated sulfuric acid, the removal of the hydrogen atom from the alpha carbon atom, and the removal of the hydrogen atom from the beta carbon atom (also known as beta elimination reaction), the reaction produces 1-Buten and water, the reaction formula is CH3CH20H = CH3CH2CH = CH2 + H2O; 2-Butanol and concentrated sulfuric acid mixed together at 170 ° C will also undergo elimination reaction, forming CH2 = CH-CH2-CH3 + H2O or CH3CH = CH-CH3 + H2O; If the molecular dehydration reaction (reaction temperature is 140 degrees), the reaction formula is 2CH3-CH (CH)-CH2-CH3-concentrated sulfuric acid, 140 degrees-CH3-CH-OCHCH3/<CH2CH3CH2CH3>. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction of concentrated sulfuric acid and sulfur under heating
Elemental sulfur can undergo an oxido-reduction reaction with concentrated sulfuric acid under heating conditions. Sulfur is oxided to sulfuric acid with a +6 valency, and concentrated sulfuric acid is reduced to nitrogen dioxide with a +4 valency. The reaction equation is: S +6HNO= heating = H ^SO+ 6NO ^+2H ^O. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What does the reaction type of concentrated sulfuric acid and potassium iodate mean?
The chemical equation of the reaction between concentrated sulfuric acid and potassium dioxide is: [8Ki +9H ^SO→ 8KHSO+ 4H ^O +4I ^H ^S]. From this reaction, the iodination ion in the iodate was oxided by concentrated sulfuric acid to the elemental iodination, and the sulfur in the concentrated sulfuric acid was reduced to hydrogen sulfureted, so this reaction was a oxido-reduction reaction. Oxidation-reduction reactions were a type of reaction in which the number of elements that were oxided changed before and after a chemical reaction. The essence of this reaction was the gain and loss of electrons or the shift of shared electron pairs. In this reaction, the reduction agent was the potassium iodate, and the oxidiser was the concentrated sulfuric acid. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to write the reaction equation of concentrated sulfuric acid and iron powder at room temperature?
Iron and concentrated sulfuric acid react. The sulfuric acid has strong oxidisation, which will vaporize iron into Fe3, and then reduce itself to NO2. The reaction equation is: Iron +6HNO2 (concentrated)= Iron (NO2)+3NO2 ^+3H2O. At room temperature, when iron came into contact with concentrated sulfuric acid, a dense layer of oxygen film would quickly form on the surface of the iron, preventing the reaction from proceeding further. However, in terms of the nature of the reaction, the reaction equation would be written as above if the decomposition was not considered. This was based on the strong oxidisation of sulfuric acid and the common change in the iron's oxidisation state. The nitrogen element in the sulfuric acid was reduced from +5 to +4 NO2, and the iron was oxided from 0 to +3 Fe3. The reaction equation was obtained according to the conservation of atoms. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>