Q: The 3 KClO in a 0.1791-g sample of
The 3 KClO in a 0.1791-g sample of an explosive was determined by reaction with 50.00 mL of 0 0. 873 2 MFe + When the reaction was complete, the excess 2 Fe + was back-titrated with 14.95 mL of 4 0 06...
See AnswerQ: An 8.13-g sample of an ant-control
An 8.13-g sample of an ant-control preparation was decomposed by wet ashing with H2SO4 and HNO3. The As in the residue was reduced to the trivalent state with hydrazine. After removal of the excess re...
See AnswerQ: The ethyl mercaptan concentration in a mixture was determined by shaking a
The ethyl mercaptan concentration in a mixture was determined by shaking a 1.795-g sample with 50.00 mL of 2 0 01204 MI. in a tightly stoppered flask: The excess 2I was back-titrated with 15.21 mL of...
See AnswerQ: A sensitive method for I− in the presence of CI−
A sensitive method for I− in the presence of CI− and Br− entails oxidation of the I− to IO3−with Br2. The excess Br2 is then removed by boiling or by reduction with formate ion. The IO3− produced is d...
See AnswerQ: A 2.552-g sample containing both Fe and V
A 2.552-g sample containing both Fe and V was dissolved under conditions that converted the elements to Fe(III) and V(V). The solution was diluted to 500.0 mL, and a 50.00-mL aliquot was passed throug...
See AnswerQ: A gas mixture was passed at the rate of 2.50
A gas mixture was passed at the rate of 2.50 L/min through a solution of sodium hydroxide for a total of 59.00 min. The 2 SO in the mixture was retained as sulfite ion: After acidification with HCl, t...
See AnswerQ: A 11.4% (w/w) NiCl2 (
A 11.4% (w/w) NiCl2 (129.61 g/mol) solution has a density of 1.149 g/mL. Calculate a. The molar concentration of NiCl2 in this solution. b. The molar Cl2 concentration of the solution. c. The mass in...
See AnswerQ: Use a spreadsheet to do the calculations and plot the titration curves
Use a spreadsheet to do the calculations and plot the titration curves for the following titrations. Calculate potentials after the addition of titrant corresponding to 10%, 20%, 30%, 40%, 50%, 60%, 7...
See AnswerQ: Write balanced net ionic equations to describe
Write balanced net ionic equations to describe
See AnswerQ: The following data represent measurements made on a process for 30 days
The following data represent measurements made on a process for 30 days. One measurement was made each day. Assuming that 30 measurements are enough that x S m and s S s, find the mean of the values,...
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