A 500 g tooth-paste sample has 0.2 g fluoride concentration. What is the concentration of fluoride in terms of ppm level?

Question

A 500 g tooth-paste sample has 0.2 g fluoride concentration. What is the concentration of fluoride in terms of ppm level?, 250, 200, 400, 1000

MARKS App · Accepted Answer

As 500 g of toothpaste ≡ 0.2 g of F - So 1 0 6 g of toothpaste ≡ 0 .2 g × 10 6 g 500 g F − = 400 g F − Hence, concentration in ppm is 400.