APP See ethyne.參閱 ethyen。...[繼續(xù)閱讀]
英漢雙解化學(xué)
字數(shù)： 19
海量資源，盡在掌握
See ethyne.參閱 ethyen。...[繼續(xù)閱讀]
See ethanoyl group.參閱 ethanoy group。...[繼續(xù)閱讀]
See carbide.參閱 carbide。...[繼續(xù)閱讀]
See carbon.參閱 carbon。...[繼續(xù)閱讀]
Describing a molecule that doesnot exhibit optical activity.用以描述不存在旋光性的分子。...[繼續(xù)閱讀]
A substance that gives rise to hydro-gen ions (or H3 O+) when dissolved in wa-ter. An acid in solution will have a pH be-low 7. This definition does not take into ac-count the competitive behavior of acids insolvents and it refers only to aqueous sys-tems...[繼續(xù)閱讀]
A type of organic com-pound of general formula RCOOCOR′,where R and R′are alkyl or aryl groups.They are prepared by reaction of an acylhalide with the sodium salt of a carboxylicacid,e. g. :RCOCl+R′COO-Na+ →RCOOCOR′+NaClLike the acyl halides,they are very...[繼續(xù)閱讀]
An indicator that iseither a weak base or a weak acid andwhose dissociated and undissociated formsdiffer markedly in color. The color changemust occur within a narrow pH range. Ex-amples are methyl orange and phenol-phthalein.一種為弱酸或弱堿的指示劑。其解離和未解離狀態(tài)的顏色有...[繼續(xù)閱讀]
The sodium salts of organicacids used in the dyeing of silks and wool.They are so called because they are appliedfrom a bath acidified with dilute sulfuric orethanoic acid.用于絲綢和羊毛染色的有機酸的鈉鹽。由于是在經(jīng)稀硫酸或醋酸酸化后使用,故得名。...[繼續(xù)閱讀]
See acyl halide.參閱 acyl halide。...[繼續(xù)閱讀]