What is the reason for increasing the dosage of concentrated sulfuric acid in the fermentation reaction?
In the esterfication reaction, the amount of concentrated sulfuric acid used was not the better. Generally speaking, the amount of concentrated sulfuric acid should be determined according to the type of the reagent and the reaction conditions. In the conventional ester reaction, 1 - 2 times the mole of concentrated sulfuric acid is usually used as a catalyst. If the reagent contains a strong acidic group, such as a starch group, a sulfuric acid group, etc., the amount of concentrated sulfuric acid can be appropriately reduced to avoid overreaction. If the amount of concentrated sulfuric acid was increased, it would cause an overreaction and produce a large amount of by-products. At the same time, it would also increase the difficulty and cost of the reaction, instead of increasing the fermentation reaction. Read more exciting novels for free
What is the reaction type of the fermentation of the sulfuric acid?
The ionisation of the acid was a type of heat absorption reaction. There were many factors that could affect the dissolution of the acid, such as adding water to dilute it, adding a base, and heating it up. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</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>
Reaction equation of concentrated sulfuric acid and sulfuric acid ester
Under normal conditions, ester and concentrated sulfuric acid would not react, so there was no reaction equation. <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 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>
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>
Reaction conditions of copper and concentrated sulfuric acid in the laboratory
The reaction between copper and concentrated sulfuric acid required heating. Under heating conditions, copper gradually dissolved and bubbles were formed. The gas produced could turn purple litmus red or the fuchsia solution faded. After cooling, the solution diluted and turned blue. The reaction equation was: CuSO4 + SO2 → +2H2O. At the same time, there are side reactions such as 5Cu +4H2SO4 (concentrated)(heating)= 3CuSO4 + Cu2S +4H2O. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
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>
The difference between the reaction equations of concentrated and diluted sulfuric acid
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>