Question

A 15.00 mL sample of solution has 5.8 × 10^-5 g of calcium ion. Calculate the concentration in each of the following units:
3.1 % (m/v)
3.2 ppt
3.3 ppm

Answer 1

1.$w\%= 5.8 × 10^-5g/15g*100=0.00039\%$

2.$3.9 ppm/1000 = 0.0039ppt$

3.$10000 ⋅ 0.00039\% = 3.9ppm$