The calcium tablet analyzed for your projects is composed mainly of calcium (in

Question

The calcium tablet analyzed for your projects is composed mainly of calcium (in the form of calcium carbonate, FM = 100.09 g/mol) and other inert filler materials. A 0.1364-gram sample of the tablet was pulverized, dissolved in acid, and diluted to the mark in a 1-L volumetric flask. The resulting solution was analyzed by flame atomic absorption spectroscopy and was found to contain 45.21 ppm Ca2+ If a tablet weighs 1.8000 g, calculate the mg of calcium (atomic mass = 40.078 g/mol) per tablet.

(a) 498.0 mg (b) 596.6 mg (c) 614.2 mg (d) 550.1 mg

(Please show all of the calculations)

Explanation / Answer

45.21 ppm Ca2+ means we had 45.21 mg Ca2+ in solution of 1L . ( since 1 mg/L = 1ppm)

hence 0.1364 g tablet gave us 45.21 mg

then 1.8 g tablet gives us ( 45.21 /0.1364) x 1.8 = 596.6 mg   of Calcium.

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