Question

0.101g of calcium is found in 650g of drinking water. what is the concentration in ppm

Answer 1

Mass of solute = 0.101 g of calcium

Mass of solvent = 650 g of water

ppm = mass of solute in mg / mass of solvent in Kg

1 g ----- 1000 mg
0.101 g --- ?

mass of  solute = 0.101 * 1000 = 101 mg

1 kg ----- 1000 g
  ? -------- 650 g

mass  of solvent = 650 / 1000 = 0,65 Kg

ppm = 101 / 0,65

= 155.38 ppm

hope this helps!