2.In this paper,the concepts and the applications of amount of substance and extent of reaction have been discussed.本文对化学教学中的物质的量和反应进度的概念和应用进行了讨论,并对它们之间的联系和区别进行了辨析。 3.The stoichometry relationships,the most important one in the titration calcdus, ...
ALEVEL 爱德思化学 AS Calculating Water of Crystallisation ALEVEL 爱德思化学 AS Calculations Using the Ideal Gas Equation ALEVEL 爱德思化学 AS Converting units (volume) ALEVEL 爱德思化学 AS Ideal Gas Equation and rearranging it ALEVEL 爱德思化学 AS The Mole ALEVEL 爱德思化学 AS Titration Calculation...
as summarized in the table below. Although most of these are familiar to all scientists, the quantity “amount of substance” and its unit “mole” are less familiar and are mainly used by chemists. In the chemistry community, the unit “mole” is familiar, but the name ...
According to provisions of IUPAC, SI and ISO the concept of equivalence should be abandoned, due to its shortcomings. The equivalent weight of a substance cannot be uniquely defined. The equivalence law applies only to acid-base and oxidation-reduction titrations, and does not apply to ...
Method for the quantitation of very small amounts of DNA ‘solubility titration’, based on the idea that if the substance under test is added gradually in small amounts to a solvent or dilute solution, its ... V Giaché,L Pirami,A Becciolini 被引量: 0发表: 1994年 A METHOD FOR THE...
A comparison of delay discounting among smokers, substance abusers, and non-dependent controls - ScienceDirect Previous studies have shown that smokers and substance-dependent individuals discount rewards that are available after a delay more than individuals withou... Michael S. Businelle a b,Megan...
True or False: the addition of a non-volatile solute to a solvent produces a solution with lower vapor pressure, a lower freezing point, and higher boiling point than that of a pure solvent. True or false? Solvolysis is the reaction of a substance with the solvent in which it is...
they had a history of mental illness, alcohol, or substance abuse. Patients were randomized into two groups (65 patients in group bolus, 65 patients in group BIS) by an anesthesiologist who was not included in the study. Randomization was performed by opening one of a series of sequentially ...
Remember, you were given mass of the substance - so you have to find number of moles first. Logged ChemBuddychemical calculators - stoichiometry, pH, concentration, buffer preparation,titrations.info DrCMS Chemist Sr. Member Posts: 1306
The acid number (the mass of KOH (or NaOH) in milligrams that is required to neutralize one gram of chemical substance) was determined by titration using phenolphthalein as the indicator. The conversion of aliphatic acid was calculated based on the acid number, according to the equation below:...