The lab tells us to prepare 50 mL of a 1000 ppm stock solution of calcium using
ID: 547264 • Letter: T
Question
The lab tells us to prepare 50 mL of a 1000 ppm stock solution of calcium using calcium chloride dihydrate (FW: 147.01 g). Show your calculations for how you would prepare the 1000 ppm standard. Thank you ! The lab tells us to prepare 50 mL of a 1000 ppm stock solution of calcium using calcium chloride dihydrate (FW: 147.01 g). Show your calculations for how you would prepare the 1000 ppm standard. Thank you ! The lab tells us to prepare 50 mL of a 1000 ppm stock solution of calcium using calcium chloride dihydrate (FW: 147.01 g). Show your calculations for how you would prepare the 1000 ppm standard. Thank you !Explanation / Answer
CaCl2*2H2O
V = 50 mL,
C = 1000 ppm
define ppm
ppm = parts per million = mg of solute / liter of solutino
therefore
V = 50 mL = 501*0^-3 L
1000 ppm = x mg /(50*10^-3) L
x = (1000)(50*10^-3)
x = 50 mg of CaCl2*2H2O
then
add
50 mg of CaCl2*2H2O into v = 50 mL, this will be 1000 ppm