In a chemical experiment, when a metal reacts with an acid, bubbles are produced. This indicates that a(n) ___ reaction is taking place. A. oxidation B. reduction C. combination D. decomposition 相关知识点: 试题来源: 解析 A。本题主要考查化学反应类型。氧化反应是指物质与氧发生的化学反应...
Zinc metal reacts with hydrochloric acid according to the balanced equation: Zn(s) + 2 HCl(aq)¡ZnCl2(aq) + H2( g) When 0.103 g of Zn(s) is combined with enough HCl to make 50.0 mL of solution in a coffee-cup calorimeter, all of the zinc reacts...
S9). Similarly, TA reacts with OH· radicals to form 2-hydroxyterephthalic acid (TA), which emits an FL signal at 420 nm58. The results showed that DCTN exhibited an enhanced FL intensity of TA compared to DP-TiO2 and P25 TiO2, which validates the enhanced production of OH· radicals ...
and an alkali metal formate which comprises acidifying the waste liquor to convert the alkali metal formate to formic acid and an alkali metal salt, adding a lower aliphatic alcohol to the acidified waste liquor to react with the formic acid to form a formate ester and to precipitate the alkal...
结果1 题目 选词填空(react/reaction/reactor)。④ Putting an acid and a metal together causes a reaction.5In fact, anything in or near the reainst becomes radioactive.⑥ How did they react when they learned the news? 相关知识点: 试题来源: 解析 答案见上 反馈 收藏 ...
7, 9 first reacts with sodium hydroxide via TSD1-2 to generate D2. Then D2 follows path D-B to generate pyrimidine 4a in the absence of a hydrogen acceptor with an energy barrier of 30.1 kcal/mol. Alternatively, D2 goes through D3 and D4 to form 4a in the presence of air ...
s method for quantitative detection of NH3. In alkaline solutions, the mercury and iodide ions react with NH3, which is almost unaffected by the pH value of the testing sample. The resulting reddish brown complex shows a strong absorbance at 420 nm, which is directly proportional to the ...
On the other hand, the holes generated in the VB with the potential below that of OH−/H2O may react with surface-bound H2O or OH− to produce hydroxyl radicals, while the electrons in the CB are picked up by electron accepting species to generate radical anions [10]. The hydroxyl ...
We synthesized water-soluble Au25(MHA)18 (6-mercaptohexanoic acid) NCs via such a two-step reduction process33. In the first reduction, HAuIIICl4 directly reacts with MHA ligands to form Au–MHA complexes under basic conditions. Those complexes are subsequently reduced using NaBH4 to form Au...
Carboxylic acid is stronger than carbonic acid; thus, fluorinated carboxylic acid can react with Li2CO3 and even with the strong base LiOH and basic Li2O on the Li surface according to the reactions shown in the supplementary information. In-depth experimental and theoretical calculations are ...