Acetic acid reaction with potassium hydroxide

Which of the following is the correct net ionic equation for the reaction of acetic acid with potassium hydroxide ... 

Formylfuran behaves in a very similar manner to benzaldehyde and undergoes the usual reactions of an aromatic aldehyde, e.g. (i) the Cannizzaro reaction with cone, sodium hydroxide to give furan-2-ylmethanol and the sodium salt of furoic acid, (ii) the Perkin reaction with acetic anhydride and sodium acetate to yield an aldol product that dehydrates to 3-(furan-2-yl)propenoic acid, and (iii) a condensation with potassium cyanide in alcoholic solution to form furoin (under these conditions, benzaldehyde undergoes the benzoin condensation) (Scheme 6.32). 

When 4-imino-9-methyl-4//-pyrido[l, 2-a]pyrimidine-3-nitrile reacted with sodium azide in a solvent at 60-70°C for 3-6 hours, ring-opened 3 - [(3 - methyl-2- py ridy l)amino]-2- (1 -H- tetrazol-5- yl)-2- propenenitrile was obtained, but the bicyclic 4-imino-9-methyl-3-(l//-tetrazol-5-yl)-4//-pyrido[l,2-a]pyrimidine could be isolated when the reaction was carried out in acetic acid at 115°C (90EUP385634). The latter product was also obtained from the ring-opened product by heating in IN hydrochloric acid at 100°C for 1 hour, or in IN potassium hydroxide at 100°C for 3.5 hours. Reaction in acetic acid was also extended to 9-phenoxymethyl, 9-(4-acetyl-... 

Eschenmoser s pyrone 38 on treatment with cyclopropenone ketal 39 in refluxing benzene afforded lactone 40 (73%). Lactone 40 on hydrolysis with acetic acid at 100°C afforded, after deprotection and decarboxylation, tropone 37 (70%). Introduction of the tropolonic hydroxyl group was achieved with hydrazine hydrate in ethanol, to give a mixture of deacetyl-colchiceinamides 41 (53%) and 42 (37%), followed by reaction with ethano-lic potassium hydroxide, which afforded tropolones 43 and 44, respectively. Tropolone 43 was converted to 44 which, therefore, became the major reaction product. Methylation of 44 gave a mixture of enol ether 18 and 45 which were separated by chromatography. 

Place a drop of the reagent upon drop-reaction paper, add one drop of the test solution (which should be slightly acidified with acetic acid (2m) containing a little sodium potassium tartrate), and then one drop potassium hydroxide (2m). A bright-pink spot, surrounded by a blue circle, is produced. 

Lead acetate solution white precipitate of lead sulphate, PbS04, soluble in hot concentrated sulphuric acid, in solutions of ammonium acetate and of ammonium tartrate (see under Lead, Section III.4, reaction 5), and in sodium hydroxide solution. In the last case sodium tetrahydroxoplumbate(II) is formed, and on acidification with hydrochloric acid, the lead crystallizes out as the chloride. If any of the aqueous solutions of the precipitate are acidified with acetic acid and potassium chromate solution added, yellow lead chromate is precipitated (see under Lead, Section III.4, reaction 6). 

Stirring, and 700 g. (1.03 mole) of red lead oxide (Pt)304) is added in portions of 15-20 g. A fresh addition is made only after the color due to the preceding portion has largely disappeared, and the temperature is kept between 55 and 80°. At the end of the reaction the thick and somewhat dark solution is cooled, and the crystalline lead tetraacetate which separates is collected and washed with acetic acid. The crude product without being dried is dissolved in hot acetic acid, and the solution is clarified with Norit, filtered, and cooled. The colorless crystalline product is dried in a vacuum desiccator over potassium hydroxide in the dark and stored in the desiccator yield 320-350 g. (70-77%). 

In a search for an aprotic solvent for acidity function studies with (Li, Na, K) acetate eutectic at200°C (Na, K)SCN was suitably miscible however, even small concentrations (1 %) inhibited the known reaction of trimethylol-ethane, which probably requires proton abstraction by the acetate anion to form an alkoxide intermediate. Since haloacetates are weaker bases than acetates, these salts were considered for diluents. Potassium trifluoroacetate (mp 135-I37°C), reported to be the most stable member of the series, was prepared from potassium hydroxide and excess trifluoroacetic acid with vacuum drying and fractional recrystallization from absolute alcohol. DTA of the white crystalline product detected decomposition as low as 125°C. Since the molten salt decomposed with bubbling at I45-150°C, this effort was discontinued. 

BORIC ACID (10043-35-3) BH3O3 Aqueous boric acid is a weak acid incompatible with alkali carbonates hydroxides strong reducing agents, including metal hydrides, nitrides, sulfides, and alkali metals. Violent reaction with potassium metal. Contact with acetic anhydride forms a heat-sensitive explosive. On small fires, use water fog. 

Quinoxaline-2-carboxaldehyde has been converted into the 2-carboxylic acid by oxidation with potassium permanganate in acetone and reduced to the 2-hydroxymethyl compound by treatment with formalin and potassium hydroxide. It also undergoes other typical reactions of aromatic aldehydes such as benzoin formation on reaction with potassium cyanide - and condensation reactions with malonic acid and its diethyl ester and Schiff base formation. Acid-catalyzed reaction of quinoxaline-2-carboxaldehyde with ethylene glycol gives the cyclic acetal the diethylacetal has been prepared by reaction of 2-dibromomethylquinoxaline with sodium ethoxide. " An indirect preparation of the oxime 11 is achieved by treatment of 2-nitromethyl-quinoxaline (10) with diazomethane followed by thermolysis of the resulting nitronic ester. 

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