Mg to another question will save this response uestion 6 A w

Mg to another question will save this response uestion 6 A water sample contains 50 mg Calcium Nitrate Ca(NO3)2 what is the concentration in ppm moles/L ppb Normality Molality? (atomic wt Ca=40; N-14, 0-16) > Moving to another question will save this response TEXTBOOK SOLUTIONS EXPERT O&/A / chemistry qu nswers / how many pom of nitrate ae in o142 of mm caino

Solution

a) 50 ppm
b) Molarity (M)= Number of moles of solute/volume of solution(liter)
M = (0.05/164)/1 = 3.05*10^-4 moles/L
c) 50000ppb
d) N =w/ EV(l) where E= 164 w=50mg, V=1L
= 5/ (40 x 0.250) = 0.5 mg. equi. /liter
e) molality = 3.05*10^-4 moles/kg