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- b) What is the function of using the following chemicals in the Determination of Zinc in Pharmaceutical Preparations by Ion Exchange Separation and Complexometric Titration experiment: Concentrated HCI, 1.5 M HCI, 0.5 M nitric acid, 4 M sodium hydroxide, 2 g of hexamine, methylthymol blue indicator and 0.01 M EDTA.4. A 1.0005 g sample contains selenite was determined using Fajan's method by performing a titration against standard 0.023 M silver nitrate solution, consuming 9.4 ml from burette to reach the end point. Write the balanced chemical equation between (FM: 169.87) AGNO; and (FM: 172.948) Na,SeO; to calculate % selenite (FM 126.968) SeO;² in the sample. * 0.343 % O 0.686 % 1.029 % 1.372 %50X TBE is 87 mM Tris-borate and 4 mM EDTA at pH 8.3. What is the molarity of each of the chemicals in 1X TBE buffer?
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- If 10x TBE contains 0.89 M Tris-borate, 0.89 M Boric acid, and 0.02 M EDTA, what is the Molar concentration of Tris-borate in 100 ml of 1x TBE?A 510 mL IV bag contains a 25% dextrose solution. How much of the original solution must be replaced with a 65% dextrose solution to increase the original concentration to 35%?1. What is the concentration of the solution prepared by diluting 50 µl of ampicillin (1.0mg/ml) to a final volume of 1ml? 2. Determine the volumes of phenol, chloroform, and isoamyl alcohol required to prepare250 ml of a 25:24:1 (v/v) solution.