1
answer
0
watching
126
views
11 Nov 2019
Lithium is often used as an internal standard in the measurement of sodium. A 5.0 ppm solution of Li^+ gives an emission signal of 46.7 units when measured at 671 nm, and a 5.0 ppm solution of Na^+ gives an emission signal of 35.5 units at 589 nm. A 50.0 mL aliquot of unknown solution containing Na^+ is mixed with a 5.0 mL solution containing 30.0 ppm Li^+ and is found to give an emission signal of 54.5 units at 589 nm and 21.3 units at 671 nm. What was the concentration of Na^+ in the original unknown sample?
Lithium is often used as an internal standard in the measurement of sodium. A 5.0 ppm solution of Li^+ gives an emission signal of 46.7 units when measured at 671 nm, and a 5.0 ppm solution of Na^+ gives an emission signal of 35.5 units at 589 nm. A 50.0 mL aliquot of unknown solution containing Na^+ is mixed with a 5.0 mL solution containing 30.0 ppm Li^+ and is found to give an emission signal of 54.5 units at 589 nm and 21.3 units at 671 nm. What was the concentration of Na^+ in the original unknown sample?
Jarrod RobelLv2
21 Jul 2019