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Hemimellitic acid: Trimellitic acid: Trimesic acid: Systematic Name: 1,2,3-benzenetricarboxylic acid 1,2,4-benzenetricarboxylic acid 1,3,5-benzenetricarboxylic acid Structural Formula: CAS Registry Number: 732304-21-1 528-44-9 554-95-0
Trimesic acid, also known as benzene-1,3,5-tricarboxylic acid, is an organic compound with the formula C 6 H 3 (CO 2 H) 3. It is one of three isomers of benzenetricarboxylic acid . [ 3 ] A colorless solid, trimesic acid has some commercial value as a precursor to some plasticizers .
Benzenedicarboxylic acid is a group of chemical compounds which are dicarboxylic derivatives of benzene. Benzenedicarboxylic acid comes in three isomers: Phthalic acid (1,2-benzenedicarboxylic acid) Isophthalic acid (1,3-benzenedicarboxylic acid) Terephthalic acid (1,4-benzenedicarboxylic acid)
The relative activity of a species i, denoted a i, is defined [4] [5] as: = where μ i is the (molar) chemical potential of the species i under the conditions of interest, μ o i is the (molar) chemical potential of that species under some defined set of standard conditions, R is the gas constant, T is the thermodynamic temperature and e is the exponential constant.
In thermodynamics, an activity coefficient is a factor used to account for deviation of a mixture of chemical substances from ideal behaviour. [1] In an ideal mixture, the microscopic interactions between each pair of chemical species are the same (or macroscopically equivalent, the enthalpy change of solution and volume variation in mixing is zero) and, as a result, properties of the mixtures ...
A strong acid, such as hydrochloric acid, at concentration 1 mol dm −3 has a pH of 0, while a strong alkali like sodium hydroxide, at the same concentration, has a pH of 14. Since pH is a logarithmic scale, a difference of one in pH is equivalent to a tenfold difference in hydrogen ion concentration.
Trimellitic acid (benzene-1,2,4-tricarboxylic acid) is a chemical compound with the molecular formula C 6 H 3 (СООН) 3. Like the other isomers of benzenetricarboxylic acid, trimellitic acid is a colorless solid. It is prepared by oxidation of 1,2,4-trimethylbenzene. [2]
2), and normally falls between 3 and 10, with 7 being neutral. Acid soils have a pH below 7 and alkaline soils have a pH above 7. Ultra-acidic soils (pH < 3.5) and very strongly alkaline soils (pH > 9) are rare. [2] [3] Soil pH is considered a master variable in soils as it affects many chemical processes.