Potassium chromate indicator

Chloride. The chloride concentration is determined by titration with silver nitrate solution. This causes the chloride to be removed from the solution as AgCl, a white precipitate. The endpoint of the titration is detected using a potassium chromate indicator. The excess Ag present after all Cl" has been removed from solution reacts with the chromate to form Ag CrO, an orange-red precipitate. 

Chlorine at the percentage level at which it occurs in sea water is usually determined by classical procedures using standard silver nitrate as the titrant and potassium chromate indicator, or alternatively by the mercuric thiocyanate procedure using dithizone as indicator. As large dilutions of the original sample are involved in these analyses, it is essential to use grade A glassware and take all other suitable precautions, such as temperature control. 

Elemental composition Ce 56.85%, Cl 43.15%. In the aqueous phase following acid digestion, cerium may he analyzed by various instrumental techniques (see Cerium). Chloride ion in the solution may be measured by ion chromatography, chloride ion-selective electrode or titration with silver nitrate using potassium chromate indicator. The solution may require appropriate dilution for analysis of both the metal and the chloride anion. 

Elemental composition Co 45.39%, Cl 54.61%. Aqueous solution of the salt or acid extract may be analyzed for cobalt by AA, ICP, or other instrumental techniques following appropriate dilution. Chloride anion in the aqueous solution may be measured by titration with silver nitrate using potassium chromate indicator, or by ion chromatography, or chloride ion-selective electrode. 

Elemental composition Cu 64.18%, Cl 35.82%. Copper(I) chloride is dissolved in nitric acid, diluted appropriately and analyzed for copper by AA or ICP techniques or determined nondestructively by X-ray techniques (see Copper). For chloride analysis, a small amount of powdered material is dissolved in water and the aqueous solution titrated against a standard solution of silver nitrate using potassium chromate indicator. Alternatively, chloride ion in aqueous solution may be analyzed by ion chromatography or chloride ion-selective electrode. Although the compound is only sparingly soluble in water, detection limits in these analyses are in low ppm levels, and, therefore, dissolving 100 mg in a liter of water should be adequate to carry out aU analyses. 

Elemental composition (for anhydrous NiCb) Ni 45.30%, Cl 54.70% Percent composition of NiCl2 6H20 Ni 24.69%, Cl 29.83%, H2O 45.48%. Nickel may be analyzed in an aqueous solution of salt by various instrumental techniques (See Nickel). Chloride ion in the aqueous solution may be determined by titration with silver nitrate using potassium chromate indicator or preferably by ion-chromatography. The solutions must be appropriately diluted for all analyses. 

Elemental composition K 52.44%, Cl 47.56%. An aqueous solution of the salt can be analyzed conveniently for potassium by various wet methods or instrumental techniques (see Potassium). Chloride ion can be determined by ion chromatography or by titration with a standard solution of silver nitrate using potassium chromate indicator. 

Elemental composition (for anhydrous SrCb) Sr 55.27%, Cl 44.73%. The salt is dissolved in water and analyzed for strontium by various instrumental techniques (see Strontium). Chloride ion is measured by ion chromatography or titration with a standard solution of silver nitrate, using potassium chromate indicator. 

Potassium chromate indicator solution Dissolve 10 g K2Cr04 in approximately 20 to 30 mL distilled water. Add AgN03 solution until a red precipitate forms. Allow it to stand for a day. Filter and dilute the volume to 200 mL. 

Titrate 20 ml aliquots with 0.1 N NaOH using phenolphthalein indicator, then titrate the neutralized solution with 0.1 N AgNOj using potassium chromate indicator. 

Titralc the mixture with 0.1 N AgiN 03 using potassium chromate indicator. 

Silver nitrate in presence of potassium chromate indicator is used for precipitating Cl", NaCl + AgNOg-----------------------i AgCl + NaNOg. ..(3.26.2)... 

Potassium Chromate indicator 5% aqueous solution of pure K2Cr04. 

Butter Butter should be analyzed for wateg salt, and butterfat content. Water can be determined by the usual drying procedure and salt by Volhard titration. Alternatively, salt may be measured by diluting it in hot water and titrating with silver nitrate using potassium chromate indicator. 

Weigh out accurately about 12 g of the powder and disperse in water, stir well and filter through a G4 sinter. Wash with water on the filter. Combine the filtrate and washings and make up to 100 cm in a volumetric flask. Add 1.0 cm of 5% potassium chromate indicator and titrate against standard 0.03 M silver nitrate. Repeat and calculate from the average titre the % Cl in your sample. Use a similar volume of the solution to determine the concentration of Na and K by atomic absorption or flame photometry and express your results kg " of silica. 

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