Sunday, October 15, 2017

Dimethyl Ketone or Aceton

Aceton Formula
Acetone have formula CH3COCH3 or in science called as 2-propanone or dimethyl-ketone. Acetone commonly use in a fragrant as a solution, colorless and flammable liquid that boils at 56.2 oC and solidifies at – 34.8 oC. Small amounts of acetone are present in blood and urine, but some diabetic patients show larger than normal people.

Diabetic evacuate this excess in urine (acetonuria) and through their lungs. In industry, acetone is an important solvent for cellulose nitrate and cellulose acetate and is also used in the production of explosives material.

Vinegar (Acetic Acid)

Acetic acid have formula CH3COOH is known as acid that use in household as additive agent in cooking recipe and more common says with vinegar. Acetic acid is a weak organic acid and the sour constituent of Vinegar. In industry, acetic acid is produced by the destructive distillation of wood and by the catalytic oxidation of formaldehyde. The pure acid is called glacial acetic acid and is a corrosive, colorless liquid with a pungent smell. It solidity at 16.63 oC. Acetic acid reacts with alcohol to form acetates that are widely used as solvents. Acetic acid also react with cellulose to form cellulose acetate, which is the starting material for rayon industry and other artificial fibers and for photographic film.

Chromium

Chromic acid include of acid substances, generally refers to a collection of compounds generated by the acidification of solutions containing chromate and dichromate anions or the dissolving of chromium trioxide in sulfuric acid. Often the species are assigned the formulas H2CrO4 and H2Cr2O7. The anhydride of these "chromic acids" is chromium trioxide, also called chromium (VI) oxide; industrially, this compound is sometimes sold as "chromic acid." Chromic acid forms are usually as chromic acid flake or chromic acid powder. Chromic acid flake form usually as technical practice and powder use for analytical purpose.


Sulfuric Acid

Sulfuric acid has the formula of H2SO4. Sulfuric acid is the most important sulfur compound and one of the largest volume industrial chemicals. To produce it by the method known as contact process, sulfur is first burned in air to yield dioxide SO2. The subsequent oxidation of SO2, is slow reaction, therefore a catalytic surface made of platinum or vanadium pentoxide is required. Sulfur trioxide reacts with water to yield sulfuric acid, because the oxide reacts with water to yield sulfuric acid; because the direct reaction of SO2 and water produces a mist of H2SO4 that is difficult to condense, the final stage of production takes place in two steps, SO2 is first dissolved in H2SO4 to produce pyrosulfuric acid; H2SO4, then sulfuric acid is produced by subsequent dilution of H2S2O2 with water:

SO2 + H2SO4 → H2S2O2
H2S2O2 + H2O → 2 H2SO4

Thursday, September 14, 2017

Basic Consepts of Analysis

Quantitative and Qualitative Analytic

There are two kind of chemical analysis method, qualitative analysis and quantitative analysis. Quantitative analysis will detect the quantity or concentration of certain substance in the solution or component, while qualitative analysis will result what the chemical inside the substance but the quantity still don't calculate yet.

The specific goals of analysis were outlined at the end of this article, descriptions of a physical situation, prediction of behavior, comparison with true behavior, evaluation of the limitation of the model, and prediction and design. The logical sequence of the process will shown with a drawing as flow diagram. The aim is to become proficient in detail at each step of the process and to understand thoroughly the interaction between the various step. We will be begin by briefly discussing each step as shown on the figure.

Ups no figure here, because removed by blogger.  Analysis is used for experimetalis that try their trial for certain period. The result is not always succeed but it to show that the experiment already going until the analysis do. The analysis should be done to measure the experiment already near of still far from the purposes.