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Cyanide ion can be determined indirectly via atomic absorption based on its ability to dissolve silver...

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Chemistry

Cyanide ion can be determined indirectly via atomic absorptionbased on its ability to dissolve silver while passing through aporous silver membrane, as described by the chemical equation
4 Ag(s) + 8 CN+2 H2O + O2 →4 Ag(CN)2 + 4 OH
A series of silver standards analyzed by atomic absorptionspectroscopy gave a linear calibration curve with a slope of 807meter units per ppm Ag. (The \"meter units\" are linearlyproportional to absorbance, and ppm Ag means µg Ag/mL solution.) Anunknown Ag solution passed through the silver membrane gave asignal of 198 meter units.
(a) Calculate the molarity of CN¯in the unknown. [Answer: 4.55x 10“ M]
(b) Briefly state a data analysis assumption you make to solvethe problem. (That is, we can take for granted that all of thereagents are pure and that there is no experimental error thatmakes the calculations invalid.)

Answer & Explanation Solved by verified expert
3.8 Ratings (710 Votes)
a The regression equation is given as y meter units 807 meter unitsppm Agx ppm Ag where y denotes the atomic absorption of the sample and x is the concentration of Ag in the sample in units of ppm or gmL The unknown sample gave an atomic    See Answer
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