1. ** Reaction of concentrated sulfuric acid and Bromine ions **
- ** Reaction equation **: 2Br^ - + 2H^+ + H2SO4 (concentrated) Br_2↑+SO_2↑ + 2H_2O\)
- ** Reaction phenomenon **: Reddish-brown elemental sulfur dioxide will be produced in the solution, and at the same time, sulfur dioxide gas with a pungent smell will be produced.
- ** Reason **: The concentrated sulfuric acid has a strong oxidisation property, and the Bromine ion has a reduction property. Under the condition of heating, the concentrated sulfuric acid oxidises the Bromine ion into Bromine, and the Bromine ion itself is reduced to Sulfur Divinity.
2. ** Heat the concentrated sulfuric acid with a concentration of about 70% with the solution of the lithium bromate **
- ** Reaction equation **:
& l
- ** Reaction Phenomenon **: Gas is generated.
- ** Reason **: In this reaction, the concentrated sulfuric acid is acidic, and the reaction between the concentrated sulfuric acid and the lithium bromate produces hydrogen bromate gas.
3. ** Condensed sulfuric acid with a concentration of more than 90% is heated and reacted with the solution of the acid. **
- ** Reaction equation **:<<2NaBr2>+3H2SO4>=
The ion equation of the reaction is: [SO2]+ Br2 + 2H2 O = 4H^{+}+ SO4 ^{2 -}+2Br2}. The experimental phenomenon was that the color of the solution faded. This was because sulfur dioxide had a reducing property, while Bromine had an oxidisating property. The two would undergo an oxidoreduction reaction, causing the color of Bromine water to fade. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
For the reaction between sulfur and metal, the following are the common reactions and situations: - Sulfur and iron reaction: The chemical equation is: FeS + S = (heating)FeS. This reaction does not involve free moving ions, so it cannot be rewritten as an ion equation. The phenomenon was the formation of black solid iron Sulphide. - Sulfur and copper reaction: The chemical equation is 2Cu + S = (heating) Cu2 S. Similarly, the ion equation cannot be written. The phenomenon was the formation of black cuprous sulfur solid. - Sulfur and Na reaction: The chemical equation is 2Na + S =(grinding)Na <2> S. There is no need to rewrite the ion equation. The phenomenon was that during the grinding process, a violent reaction formed a white solid of sulfur dioxide. - Sulfur and aluminum reaction: The chemical equation is 3S +2AI = Al2S, which cannot be rewritten as an ion equation. The reaction phenomenon was the formation of aluminum sulfur solid. - Sulfur and mercury reaction: The chemical equation is as follows: Mercury + S = HgS, which cannot be written as an ion equation. The reaction phenomenon is the formation of black mercury sulfur solid. In general, since most of these reactions were solid-state reactions or did not carry out the ionisation process in the solution system, there was basically no ion equation. Most of the reaction phenomena were the formation of the corresponding sulfur solid, and the color of the solid was different. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The reaction ion equation was: Cr2O72- +3SO2 + 2H + = 3SO42- +2Cr3 + + H2O. There was no reference to this reaction, so it was impossible to give an accurate answer. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
溴与二氧化硫反应的离子方程式为:\(Br_{2}+SO_{2}+2H_{2}O = 2Br^{-}+SO_{4}^{2 -}+4H^{+}\);碘与二氧化硫反应的离子方程式为:\(I_{2}+SO_{2}+2H_{2}O = 2I^{-}+SO_{4}^{2 -}+4H^{+}\)。未查询到关于溴、碘与二氧化硫反应现象的相关内容,对不起,无法准确回答反应现象部分内容。 <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>
Dilute sulfuric acid and sulfuric acid did not react, so there was no reaction phenomenon, and there was no ion equation for the reaction. This was because they did not meet the conditions for a metathesis reaction, that is, there was no precipitations, gases, or water, and they were all acids with similar properties. They could react with alkalites or basic oxides to form salt. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Sulfur dioxide ($SO2 $) and sulfuric acid ($H2SO4 $) had different reactions. If it was concentrated sulfuric acid, the reaction equation was: 2H2SO4 (concentrated)+ SO2 = 2H2O +3SO3. The phenomenon was that the pungent gas ($SO2 $) was absorbed by concentrated sulfuric acid, and a small amount of smoke might be seen during the reaction ($SO3 $might form acid mist in the air). If it was diluted sulfuric acid, it would basically not react. He could simply draw a picture with the reaction equation written on it and a small picture beside it to indicate the phenomenon of smoke production. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
5Br-+BrO3-+6H+ =Br2+3H2O。 <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
以硫酸为例,二氧化硫与酸性重铬酸钾反应的化学方程式为:\(K_{2}Cr_{2}O_{7}+3SO_{2}+H_{2}SO_{4} = K_{2}SO_{4}+Cr_{2}(SO_{4})_{3}+H_{2}O\),其离子方程式为:\(Cr_{2}O_{7}^{2 - }+3SO_{2}+2H^{+}=3SO_{4}^{2 - }+2Cr^{3 + }+H_{2}O\)。 在这个反应中,重铬酸钾(\(K_{2}Cr_{2}O_{7}\))中的铬元素从 +6价被还原为 +3价的\(Cr^{3 + }\),而二氧化硫(\(SO_{2}\))被氧化为硫酸根离子(\(SO_{4}^{2 - }\))。反应现象方面,溶液的颜色会发生变化,由于重铬酸根离子(\(Cr_{2}O_{7}^{2 - }\))通常具有特定颜色(一般为橙红色),反应后生成的\(Cr^{3 + }\)离子具有不同颜色(一般为绿色),所以反应过程中可以观察到溶液颜色由橙红色转变为绿色。 <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>
This reaction did not have an ion equation because there were no ions involved in the reaction. The chemical equation was 2H2S + SO2 = 3S → +2H2O. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The chemical equation for the reaction between sulfur and oxygen is: S + O2 SO_2\)。 The reaction phenomenon was: burning in the air to produce a light blue flame, releasing heat and producing a gas with a pungent smell; burning in oxygen to produce a bright blue-purple flame, releasing heat and producing a gas with a pungent smell. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>