Borax solution

Post-curing and chemical modification improves chemical and solvent resistance (20). Paraformaldehyde and acetylene diurea are added to a hot borax solution. Toluenesulfonamide (p and o), a few drops of phosphorous acid. Brilliant Yellow 6G [2429-76-7] Rhodamine E3B, and Rhodamine 6GDN [989-38-8] are added. After heating, the mass is cured in an oven at 150°C. The resulting cured resin is thermoset but can be ground to fine particle sizes. 

Perbora.tes, Sodium perborate [7632-04-4] is the most widely used soHd peroxygen compound. Commercially it is available as a tetrahydrate [10486-00-7] and a monohydrate [10322-33-9]. The tetrahydrate is produced by treating a borax solution with hydrogen peroxide and sodium hydroxide ... 

The pH of a borax solution iacreases slightly with increasing concentration (Table 10) and drops slightly with increasing temperature. The vapor pressures of aqueous saturated borax solutions at various temperatures are (73,74) ... 

The water solubiUty of kernite is shown in Figure 5 and in Table 9. Kernite is the stable phase in contact with its solutions from 58.2°C to ca 95°C (71). Its rate of crystallisation is, however, much slower than that of the pentahydrate. Large kernite crystals can be grown slowly by seeding saturated borax solutions. 

The boron (along with the oxygen and salt) in a borax solution helps to disinfect by killing bacteria and fungi. 

For pure A1 in inorganic electrolytes which form barrier oxide films, such as boric acid-borax solution, surface defects ( flows ) have a dominant role.308 It has been shown312 that in this case only, EL vanishes for electropolished samples. 

India ink is stabilized to prevent sedimentation by adding substances such as shellac in borax solution, soap, gelatine, glue, gum arabic, and dextrin. 

A simple putty can be made with Elmer s glue by mixing 2 tablespoons (30 mL) of glue with 4 teaspoons (20 mL) of water in a jar. In another jar, mix about cup (120 mL) of water, / teaspoon of Borax, and 2 or 3 drops of food color. Take a tablespoon (15 mL) of the Borax solution... 

Toxicosis in animals has resulted from ingestion of boric acid or borax solutions, from topical applications of boric acid solutions to damaged skin, and from inhalation of boranes the exact mechanisms of action are not understood. Boron and its compounds are potent teratogens when applied directly to the embryo, bnt there is no evidence of mutagenicity or carcinogenicity. Boron s unique affinity for cancerons tissnes has been exploited in neutron capture radiation therapy of malignant hnman brain tnmors. 

Preparation from Borax. Dissolve 12 g of borax in 25 ml of water in a beaker with heating. What is the reaction of the solution to litmus and what is it due to Write the molecular and net-ionic equations of the borax hydrolysis reaction. How can the hydrolysis of borax be facilitated Calculate what amount of a 25% hydrochloric acid solution is needed to prepare boric acid from 12 g of borax. Measure off the calculated amount of acid, and taking a small excess amount, pour the acid into the hot borax solution. Let the solution cool slowly. What substance crystallizes Filter off the crystals on a Buchner funnel, dry them between filter paper sheets, and recrystallize them from hot water, guiding yourself by the table of solubilities. Determine the product yield (in per cent). Keep the prepared boric acid for the following experiments. 

Lae resin is very difficultly soluble in alcohol, though, like copal, it may be completaly teken up by this advent. Like most of the other resins, It has a strong affinity for bases, with which it forms definite compounds. Dilute hydrochloric acid and acetic acid dissolve the rosin freely, but not the strong sulphurto acid. Borax solutions with the aid of heat also take it up. The portion soluble in alcohol has a specific gravity of 1-139, IIhvekdokbeN found it to be a compound of several rosins, namely—... 

To convert from kPa to mm Hg, multiply by 7.5. Values for the specific heat of aqueous borax solutions (73) Borax decahydrate, wt % as a function of weight percent decahydrate are Specific heat, k[/(kg-K)... 

Most of the work on the boric acid-diol reaction during the last twenty years has been done to determine the coordination number of the diol (number of diol molecules) in the complex and to evaluate the equilibrium constant (often called a stability constant) for a number of diol-boric acid reactions. Several techniques have been used to study these questions, including polarimetry (7), optical rotatory dispersion (8), polarography (9), conductivity (3), vapor pressure osmometry (10), and electrochemistry (II, 12, 13). The most frequently studied system has been the electrochemical (pH) titration of boric acid or borax solutions with various diols. 

In this case the coordination number is —2 times the slope of the line for a plot of pH vs. log Df. The difference between slopes in Equations XVII and XVIII resulted in much of the confusion over the interpretation of diol titrations of boric acid and borax solutions (II, 12, 19). 

Toluidine Blue O is dissolved in a buffer with a pH between 4 and 8, or in 70% ethanol or in a 0.05% (w/v) borax solution and kept at 4°C. The specimen is stained for 1-10 min. washed for 1-2 min. in distilled water, or in the buffer used to dissolve the Toluidine Blue O, or in ethanol until all excess stain is removed. When the specimen is viewed under the microscope, different cell components produce colors different colors (metachromasia) DNA is bluish-green, RNA is violet, the middle lamella is red, non-lignified cell walls are red-violet or blue-violet, and polymerized phenolics such as lignin are green or blusih-green. This stain is therefore of general use. 

Method. 1 ml of 1 N hydrochloric acid is added to a screw-capped test-tube containing the triazine residue. The tube is tightly capped and then heated at 150 °C overnight (16-18 h), cooled and carefully opened. 1.0 ml of 1.0 N sodium hydroxide is then added followed by 2.0 ml of 5% borax solution. The tube is shaken and 1 ml of a solution of DNS-C1 (1 mg/ml in acetone) is added. The cap is replaced and the contents of the tube are warmed in a water bath at 45 °C for 15-20 min. The tube is then cooled and opened. 

Only a few borates of cadmium are known. Cadmium monoborate monohydrate CdO B203 H20 is formed in cadmium nitrate/borax solutions. The 1 2 5 borate precipitates from hot boric acid solutions containing cadmium acetate (206). Its dehydration occurs in three stages, with one water molecule lost at 100°C, three at 100-150°C, and the last at over 300°C. 

The borate NiO B203 8H20 is prepared from nickel salt and borax solutions after digesting with boric acid. The decahydrate is formed from the octahydrate in boric acid at temperatures below 10°C above 80°C the pentahydrate separates out (206). Both the octahydrate and decahydrate have the hexaborate ion BuO O ) - (378, 380). 

This formula can also be used as a divided developer. To use as a two-solution developer try 4 minutes at 68F/20C followed by 3 minutes in a 2% borax solution. Use intermittent agitation in the first solution and gentle but continuous agitation in the second solution. This will prevent uneven development, especially with 120 roll film. For higher contrast lighting, increase exposure and shorten the time in the first solution. 

Asahi APR Unsaturated polyester of polyethylene oxide) and fumaric acid Triethylene glycol diacrylate Liquid Borax solution... 

This gel is usually prepared by adding 1 part of a 4 mass % aqueous sodium borate (borax) solution to 3 or 4 parts of a 4 mass % aqueous poly(vinyI alcohol) solution. 

Pour 30 mL of the borax solution into the glue mixture. Then quickly and thoroughly stir the mixture. 

Dispose of any excess borax solution as directed by your teacher. 

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