Sapling Learning In clinical applications, the unit parts per million (ppm) is u

Question

Sapling Learning In clinical applications, the unit parts per million (ppm) is used to express very small concentrations of solute where 1 ppm is equivalent to 1 mg of solute per 1 L of solution. Calculate the concentration in parts per million for each of the following solutions a) There are 29 of calcium in a total volume of 91 mL. Number ppim b) There is 0.79 mg of caffeine in a total volume of 127 mL Number ppm There is 0.67 mg of trace particles in a total volume of 57 dL Rution Number ppm Hint Previous Give Up & View Solution Q Check Answer Next Exit

Explanation / Answer

ppm is mass in mg / volume in L

a)

mass = 29 ug = 0.029 mg

volume = 91 mL = 0.091 L

So,

ppm = 0.029 mg / 0.091 L

= 0.32 ppm

Answer: 0.32 ppm

b)

mass = 0.79 mg

volume = 127 mL = 0.127 L

So,

ppm = 0.79 mg / 0.127 L

= 6.2 ppm

Answer: 6.2 ppm

c)

mass = 0.67 mg

volume = 57 dL = 5.7 L

So,

ppm = 0.67 mg / 5.7 L

= 0.12 ppm

Answer: 0.12 ppm

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