Lime water

Sulphuric add test. To 0-5 g. of oxalic acid or of an oxalate, add I ml. of cone. H2SO4 and warm CO and COg are evolved (cf. formic acid). The CO burns with a blue flame. Detect the COg by passing the mixed gases evolved into lime-water. It is essential to test for the COj in a separate reaction, or (if the same test-tube is used) before testing for CO. 

Phenol should not be allowed to come into contact with the skin for it causes painful burns. The best antidote for phenol burns is a saturated solution of bromine in glycerine if all undi.ssolved bromine is allowed to settle out before the solution is used, there is no danger of bromine burns. Lime water may also be employed. 

Acids including oxalic acid). Dilute by drinking much water, followed by lime water or milk of magnesia. Milk may then be given but no emetics. 

Most carbide acetylene processes are wet processes from which hydrated lime, Ca(OH)2, is a by-product. The hydrated lime slurry is allowed to settle in a pond or tank after which the supernatant lime-water can be decanted and reused in the generator. Federal, state, and local legislation restrict the methods of storage and disposal of carbide lime hydrate and it has become increasingly important to find consumers for the by-product. The thickened hydrated lime is marketed for industrial wastewater treatment, neutrali2ation of spent pickling acids, as a soil conditioner in road constmction, and in the production of sand-lime bricks. 

The rat LD qS are 13, 3.6 (oral) and 21, 6.8 (dermal) mg/kg. Parathion is resistant to aqueous hydrolysis, but is hydroly2ed by alkah to form the noninsecticidal diethjlphosphorothioic acid and -nitrophenol. The time required for 50% hydrolysis is 120 d ia a saturated aqueous solution, or 8 h ia a solution of lime water. At temperatures above 130°C, parathion slowly isomerizes to 0,%diethyl 0-(4-nitrophenyl) phosphorothioate [597-88-6] which is much less stable and less effective as an insecticide. Parathion is readily reduced, eg, by bacillus subtilis ia polluted water and ia the mammalian mmen to nontoxic 0,0-diethyl 0-(4-aminophenyl) phosphorothioate, and is oxidized with difficulty to the highly toxic paraoxon [511-45-5] diethyl 4-nitrophenyl phosphate d 1.268, soluble ia water to 2.4 mg/L), rat oral LD q 1.2 mg/kg. 

Spills and Disposal Procedures. If a spiU occurs outdoors, personnel should stay upwind of it. If the spiU is in a diked area it may be possible to recover much of the bromine, otherwise it should be absorbed with appropriate material. A water spray can be used to control bromine vapors and a mild ammonia atmosphere helps to neutralize bromine vapors. Small spills may be neutralized with lime water slurry or soda ash and flushed with large amounts of cold water. 

Lapacol [84-79-7] (Cl Natural Yellow 16 Cl 75490) (lapachic acid, taiguie acid, tecomin) is a yellow pigment occurring in the wood of trees of the genus Tecoma native to the West Indies and tropical South America. The shavings of the wood, treated with lime water, give an extract that dyes cotton yellow. 

NaiCOfl or ctileitim hydroxide (Ca(OH)2). i.e. lime water. The basic (alkaline) effluents can be treated with any mineral acid, preferably sulphuric acid (Hi.SOj). until the required pH value is obtained. 

In the presence of lime water more complex reactions occur, leading to the formation of aldoses and hexoses (iv). This particular reaction is of interest to the biochemist as it is now generally held that optically active plant carbohydrates are obtained from carbon dioxide and water via formaldehyde. 

Calcium hydroxide (Ca(OH)2 (slaked lime) ) White powder soluble in water yielding lime water. Alkaline... 

In a study of crystal precipitation of calcium carbonate during the batch carbon-ation of lime water, individual crystals and agglomerated particles were observed as shown in Figure 8.18(a), (b) and (c), respectively (Wachi and Jones, 1991b). 

Reaction.— i. Heat a gram or two of the acid in a test-tube over a small flame and have at hand a second test-tuloe one-third full of lime water. The acid decomposes at i[Pg.98]

J. Black showed that CO2 was produced by fermentation of vegetables, by burning charcoal and by animals (humans) when breathing turns lime water turbid,... 

Atzkalk) m. caustic time (gebrannter) quicklime geldschter) slaked lime), -loeung) /. lime water. 

Einigung, /. unification, union agreement. Einigungskitt, m. cement putty, elnimpfen, v.t. inoculate. einjUbrig, a. of one year, annual, eiokalken, einkalken, v.t. treat in lime, soak in lime water,... 

Schwodwasser, n. lime water. schwoU, pret. (of schwellen) swelled, etc. schwomm, pret. (of schwimmen) swam, fioated. schwor, pret. (of schwaxen) festered (of schwdren) swore, schwttren, v.t. [Pg.404]

The product, calcium hydroxide, is commonly known as slaked lime because, as calcium hydroxide, the thirst of lime for water has been quenched (slaked). Slaked lime is the form in which lime is normally sold because quicklime can set fire to moist wood and paper. In fact, the wooden boats that were once used to transport quicklime sometimes caught fire in the heat of reaction when water seeped into their holds. An aqueous solution of calcium hydroxide, which is slightly soluble in water, is called lime water. It is used as a test for carbon dioxide, with which it reacts to form a suspension of the much less soluble calcium carbonate ... 

Sodium hydroxide (NaOH) (caustic soda) Potassium hydroxide (KOH) (caustic potash) Calcium hydroxide (Ca(OH)2) (slaked lime) Ammonium hydroxide (NH4OH) (aqueous ammonia solution) White deliquescent solid. Sticks, flakes, pellets. Dissolution in water is highly exothermic. Strongly basic. Severe hazard to skin tissue White deliquescent solid. Sticks, flakes, pellets. Dissolution In water is highly exothermic. Strongly basic. Severe hazard to skin tissue White powder soluble in water yielding lime water. Alkaline Weakly alkaline. Emits ammonia gas. Severe eye irritant... 

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