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12 Nov 2019
5-16. A 5.00-mL aliquot of bleach (density = 1.16 g/mL) was diluted and treated with excess KI, leading to the reaction ocr + 21-+ 2H + â Cl-+12 + H20 The liberated I required 22.8 mL of 0.214 M Na,S,0, for titration (see Reaction 5-3). Calculate the % OCI-(hypochlorite ion) in the bleach. 5-17. A sample of an antihistamine, brompheniramine maleate, weighing 4.6330 g was dissolved in alcohol and decomposed with metallic sodium. The resulting solution was treated with 10.00 mL of 0.2500 M AgNO3, an amount sufficient to precipitate all of the liberated bromide ion as AgBr. The excess AgNO3 was titrated with 0.1214 M KSCN, requiring 14.42 mL to reach the end point: Ag++SCN- AgSCN (s) â Calculate the % Br in the sample, what additional piece of information is needed to deter- mine the percentage of the antihistamine in the sample?
5-16. A 5.00-mL aliquot of bleach (density = 1.16 g/mL) was diluted and treated with excess KI, leading to the reaction ocr + 21-+ 2H + â Cl-+12 + H20 The liberated I required 22.8 mL of 0.214 M Na,S,0, for titration (see Reaction 5-3). Calculate the % OCI-(hypochlorite ion) in the bleach. 5-17. A sample of an antihistamine, brompheniramine maleate, weighing 4.6330 g was dissolved in alcohol and decomposed with metallic sodium. The resulting solution was treated with 10.00 mL of 0.2500 M AgNO3, an amount sufficient to precipitate all of the liberated bromide ion as AgBr. The excess AgNO3 was titrated with 0.1214 M KSCN, requiring 14.42 mL to reach the end point: Ag++SCN- AgSCN (s) â Calculate the % Br in the sample, what additional piece of information is needed to deter- mine the percentage of the antihistamine in the sample?
Hubert KochLv2
25 Aug 2019