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- Additives that may be included in the mobile phase for SEC hexane Salts Detergents UreaAn impure sample containing 2.00 g of sodium carbonate and bicarbonate was taken. It was dissolved in water and then crushed with hydrochloric acid (0.1 N). If the burette reading was at the end point of the phenolphthalein 7.5 ml and at the end of the orange methyl point was 20.0 ml. Calculate the ratio The percentage of sodium bicarbonate in the sample. Note that the molecular weight of sodium bicarbonate is 84 *Are these systems moderated, explain. A. An aqueous solution of plutonium nitrate B. A tray of uranium trioxide (UO3) powder, containing 1% moisture.
- The thiourea in a 1.455 g sample of organic material was extracted into a dilute sulfuric acid solution and titrated with 37.31 mL of 0.009372 M Hg2+ via reaction: 4(NH2)2CS + Hg2+ →[(NH2)2CS]4 Hg2+Will phthalimide dissolve in aqueous sodium bicarbonate?Based from the given problem, What is the molecular weight and meq of potassium biphthalate (C8H5KO4)?
- The Kjeldahl method was used to analyse the nitrogen content in 0.6723 g of food sample. The amount of liberated NH3 in the sample was reacted with 50.0 mL of 0.1050 M HCl. The excess acid required 12.35 mL back titration with 0.0915 M NaOH. Calculate the % nitrogen in the sample.What will happen to Dichloromethane when it is added to Silver nitrate? Does it gives a postive solution? Give an inference whyWhat is precipitation from homogeneous solution; what are the benefits of this method.
