Having a tendency to release a pro-ton or to accept an electron pair from a do-nor. In aqueous solutions the pH is a meas-ure of the acidity,i.e.an acidic solution isone in which the concentration of H3O+ex-ceeds that in pure water at the same tem-peratur...[繼續(xù)閱讀]

    A hydrogen atom in amolecule that enters into a dissociation e-quilibrium when the molecule is dissolvedin a solvent. For example,in ethanoic acid(CH3COOH)the acidic hydrogen is the oneon the carboxyl group,—COOH.當(dāng)分子溶于溶劑時(shí),分子中參與解離平衡的氫原子。例如,在醋酸(CH...[繼續(xù)閱讀]

    An oxide of a nonmetal thatreacts with water to produce an acid orwith a base to produce a salt and water.Forexample,sulfur(Ⅵ) oxide ( sulfur trioxide)reacts with water to form sulfuric(Ⅵ)acid:SO3 +H2O →H2SO4and with sodium hydroxide to produce so-dium su...[繼續(xù)閱讀]

    Volumetric analysis or acid-base titration in which a standard solutionof an acid is added to the.unknown (base)solution plus the indicator. Alkalimetry isthe converse,i.e. the base is in the buret.在指示劑存在的情況下,將標(biāo)準(zhǔn)酸加入含指示劑的未知(堿)溶液的容量分析法或酸...[繼續(xù)閱讀]

    See dissociation constant.參閱dissociation constant。...[繼續(xù)閱讀]

    See pollution.參閱pollution。...[繼續(xù)閱讀]

    A salt in which thereis only partial replacement of the acidic hy-drogen of an acid by metal or other cations.For polybasic acids the formulae are of thetype NaHSO4 (sodium hydrogensulfate)and Na3 H(CO3)2 · 2H2O(sodium sesqui-carbonate). For monobasic aci...[繼續(xù)閱讀]

    A measure of the free acidpresent in fats,oils,resins,plasticizers,andsolvents,defined as the number of milligrams 1 of potassium hydroxide required toneutralize the free acids in one gram of thesubstance.是脂肪、樹脂、塑料和溶劑中游離酸的量度,定義為中和1g物質(zhì)中的游離酸所...[繼續(xù)閱讀]

    A synthetic fiberthat consists of a copolymer of 1-cya-noethene (acrylonitrile,vinyl cyanide) andethenyl ethanoate (vinyl acetate). 由1-腈基乙烯(丙烯腈,乙烯基腈)和乙烯基乙基酯(乙烯基乙酸酯)的共聚物組成的合成纖維。...[繼續(xù)閱讀]

    See propenal.參閱propenal。...[繼續(xù)閱讀]