英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：


请选择你想看的字典辞典：
单词字典翻译
tollen查看　tollen　在百度字典中的解释百度英翻中〔查看〕
tollen查看　tollen　在Google字典中的解释Google英翻中〔查看〕
tollen查看　tollen　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Tollens reagent - Wikipedia
    Tollens' test for aldehyde: left side positive (silver mirror), right side negative Ball-and-stick model of the diamminesilver(I) complex Tollens' reagent (chemical formula ()) is a chemical reagent used to distinguish between aldehydes and ketones along with some alpha-hydroxy ketones which can tautomerize into aldehydes
  • Tollens’ Test: Definition, Example, and Mechanism
    In an aqueous solution, fructose is enolized and converted into aldehyde in a basic medium As aldehydes generally reduce Tollen’s reagent, thus fructose also reduces Tollen’s reagent References Definition and preparation – Chem libretexts org; Definition and preparation – Byjus com; Definition and preparation – Vedantu com
  • Tollens’ Test - Chemistry LibreTexts
    Tollens rsquo; test, also known as silver-mirror test, is a qualitative laboratory test used to distinguish between an aldehyde and a ketone It exploits the fact that aldehydes are readily oxidized, …
  • Tollens’ Test- Definition, Principle, Procedure, Result, Uses
    Tollen’s test is routinely performed in chemical laboratories for the qualitative organic analysis, which distinguishes aldehydes from ketones This test is also used for the differentiation of reducing sugars from non-reducing sugars
  • What is Tollens Test? - BYJUS
    What is Tollens Test? Tollens Test is a very useful method to distinguish between aldehydes and ketones This qualitative lab test is also referred to as the silver mirror test
  • Tollen’s test or Silver mirror test: Principle, Requirements . . .
    Tollen’s test is a chemical test used to distinguish reducing sugars from non-reducing sugars It is also known as silver mirror test since free silver metal is formed at the end of this test reaction
  • Tollens’ Test: Description, Principle, Procedure And Result . . .
    When a compound containing an aldehyde group is reacted with a Tollen’s reagent also referred to as ammoniacal silver nitrate solution, the diamminosilver(I) ion-Ag(NH 3) 2 + in the reagent, though a very weak oxidizing agent, oxidizes aldehydes to carboxylate anions





中文字典-英文字典  2005-2009