In the process of oxalic acid crystals only formed in a cold atmosphere, so that the process of oxa

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Oxalic acid, "Ethanedioic Acid" is a member of the kkarboksilat acid which has the molecular formula C 2 H 2 O 4. kormersial the oxalic acid dihydrate known in solid form which has the molecular formula nh4 C 2 H 2 O 4 2H 2 O. The usefulness of oxalic acid is very much among other ingredients mixing of dyes in textile and paint industry, neutralizing the excess alkali leaching and as bleaching. Oxalic acid is used in the metal industry as a coating material that protects the metal from the crust, while the plant polymer used as the initiator.
Oxalic acid was first disintesisi by Carl W.Scheele in 1776 by way oxidize sugar with nitric acid (Kirk-Othmer, 1996). In 1784 has proven origin of the oxalate found in sorrel plants. In 1829, gay lusaac found that oxalic acid can be produced by fusing sawdust with alkali solution. Oxalic acid is a derivative of a carboxylic acid containing two carboxyl groups located at the ends of the straight-chain kar4bon which has the molecular formula C 2 H 2 O 4 is odorless, higraskopis, white to colorless and has a molecular weight of 90 g / mol . Physical and chemical properties of oxalic acid C 2 H 2 O 4 2H 2 O, namely:
The glass beaker
3 When you have the steam arising brown NO 2, in the lift flat pumpkin before, and then transferred to the reaction proceed without heating, then on leave for 15 minutes. nh4
4 DIT redeemable earlier nh4 reaction results into a glass measuring cup 100 ml, then erlenmeyar washed with 10 ml of cold distilled water and washing results fed into another beaker, then add 10 ml of HNO 3 p ekat.
8. Dis aring k ristal formed oxalic acid, oxalic acid and then in recrystallization obtained by in larutkannya in hot water and then cooled.
Weight of filter paper blank = 1:07 g
Weight = 2,328 grams of oxalic acid
Melting point: Early melt = 103 C
Depleted melt = 117 C
Form of white crystalline powder =
Based on the manufacturing process of the synthesis of oxalic acid (H2C2O4) performed through the oxidation nh4 reaction of sucrose or table sugar with nitric acid (HNO3). Sucrose were mixed into concentrated nitric acid when heated will cause gas nitro (NO2) which is brown. Therefore Sintesi manufacture of oxalic acid was carried out in a fume hood, due to the reaction of NO2 is formed nh4 when the vapors are inhaled karinogenik.
The heating process is used to saturate the solution formed and serves to obtain crystals of oxalic acid which is really pure. So that needs to be done repeatedly until the gas heating dispensed were no longer brown or had no gas containing nitro and helped with the process of dilution with distilled water.
In the process of oxalic acid crystals only formed in a cold atmosphere, so that the process of oxalic acid is regulated so that the crystals can be formed. Oxalic acid crystals will be formed based on the theory that is yellowish white. Similarly, based on the results of experiments, the crystals nh4 formed are fine white powder which weighed earlie