Which compound of Grp 3 cations is a white, gelatinous precipitate that produces a colored precipitate when in contact with its confirmatory reagent?
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Which compound of Grp 3 cations is a white, gelatinous precipitate that produces a colored precipitate when in contact with its confirmatory reagent?
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- 25 g of the dilute mixture of H2SO4 and HNO3 is completed to 500 mL with water. When BaCl2 is added to 10 mL of this solution, the precipitate obtained is 362 mg. Another 20 mL portion taken from the solution is neutralized with 39.2 mL of 0.2 M NaOH solution in the presence of phenolphthalein. Calculate the percentage of HNO3 in the starting mixture.Suppose you mistakenly used tap water instead of distilled water to dissolve your consumer product. When you did the test for chloride, you observe formation of a white precipitate after addition of silver nitrate. Can you rightly conclude that the product being tested contains chloride? Explain your reasoning.A saturated solution of an unknown solid reacted with AgNO3 to give a pale yellow precipitate and also reacted with Pb(NO3)2 to give a white precipitate. Based on only these two results, you can conclude that the unknown solid contains which anion? Write the correct balanced equations for the reaction of the anion with each of these reagents.
- You were assigned to assay a product sample of milk of magnesia. A 0.600-g sample was reacted with 25.00 mL 0.10590 N H2SO4. The excess unreacted acid in the solution required 13.00 mL of 0.09500 N NaOH when titrated to reach the methyl red end point. In terms of Mg(OH)2 content, does the sample product conform to the USP requirement? Justify your answer through calculations.1. A sample of freshly precipitated silver chloride weighs 704.7 mg. Before the solution can be filtered and washed, 10.0 mg of AgCl is photodecomposed. After the precipitate is filtered and washed, another 10.0 mg of AgCl is photodecomposed. Calculate the weight of the precipitate.When you add HCl to a solution containing aqueous sodium acetylsalicylate (structure shown below), a precipitate formed. Which is the structure of this precipitate?
- A 0.2985 g sample of an antibiotic powder was dissolved in HCl and the solution diluted to 100.0 mL. A 20.00 ml aliquot was transferred to a flask and followed by 25.00 ml of 0.01886 M KBRO3. An excess of KBr was added to form Br2, and the flask was stoppered. After 10 min, during which time the Br2 brominated the sulfanilamide, an excess of KI was added. The liberated iodine titrated with 12.88 ml of 0.1235 M sodium thiosulfate. Calculate the percent sulfanilamide (NH2C,H4SO2NH2) in the powder. Bro, + 5Br + 6H* 3Br, + 3H,0 NH2 NH2 Br. Br + 2B12 + 2H++ 2Br SO,NH2 SO,NH2 sulfanilamide Br, + 51 2Br + 12 excess 2 + 25,0,- 25,0,2 + 21- - MM: NH2C6H4SO2NH2 = 172.21 KBRO3 = 167.00 KBr 119.00What is the importance of non-aqueous titrations in pharmaceutical analysis?What method is used to precipitate arsenic (III) ions? Treatment with thioacetamide, acetic acid followed by hydrogen peroxide, magnesium nitrate and silver nitrate with acetic acid. Treatment with thioacetamide, acetic acid, hydrochloric acid followed by magnesium nitrate and silver nitrate with acetic acid. Treatment with thioacetamide followed by hydrogen peroxide, magnesium nitrate and silver nitrate with acetic acid. Treatment with thioacetamide, acetic acid, hydrochloric acid followed by hydrogen peroxide, magnesium nitrate and silver nitrate with acetic acid. C Treatment with acetic acid, hydrochloric acid and hydrogen peroxide.
- LPG with bromine Get one tube containing LPG and quickly add a few drops of bromine Replace the cork immediately to prevent the escape of the gas Shake the tube and observe for the appearance of a precipitate Test for the presence of HBr with a blue litmus paper moistened with distilled water and held with tweezers. What are your observations? What is the appearance of the precipitate? Did the blue litmus paper changed in color?A student found two bottles of compounds with missing labels. The compounds are either Benzyl chloride or Bromobenzene. To figure out the contents of each bottle, the student put 2 drops of each compound into separate test tubes labeled X and Y and added 1 mL of a mixture of NaI and acetone to each tube. After 45 seconds, the student observed a white color precipitate in tube X, while there was no precipitate formed in tube Y. What compound (Benzyl chloride or Bromobenzene) does tube X contain? WhyHow can the relative supersaturation be varied during precipitate formation?