Cyanide ion can be determined indirectly via atomic absorption based on its ability to dissolve silver while passing through a porous 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 absorption spectroscopy gave a linear calibration curve with a slope of 807 meter units per ppm Ag. (The "meter units" are linearly proportional to absorbance, and ppm Ag means µg Ag/mL solution.) An unknown Ag solution passed through the silver membrane gave a signal of 198 meter units. (a) Calculate the molarity of CN¯in the unknown. [Answer: 4.55 x 10“ M] (b) Briefly state a data analysis assumption you make to solve the problem. (That is, we can take for granted that all of the reagents are pure and that there is no experimental error that makes the calculations invalid.)
Cyanide ion can be determined indirectly via atomic absorption based on its ability to dissolve silver while passing through a porous 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 absorption spectroscopy gave a linear calibration curve with a slope of 807 meter units per ppm Ag. (The "meter units" are linearly proportional to absorbance, and ppm Ag means µg Ag/mL solution.) An unknown Ag solution passed through the silver membrane gave a signal of 198 meter units. (a) Calculate the molarity of CN¯in the unknown. [Answer: 4.55 x 10“ M] (b) Briefly state a data analysis assumption you make to solve the problem. (That is, we can take for granted that all of the reagents are pure and that there is no experimental error that makes the calculations invalid.)
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