Question

In a water sample the concentration of dissolved oxygen is found to be 3.5  103 M. Express the dissolved oxygen content in ppm unit in the sample. The molar mass of O2 is 32 g mol

Answer 1

Hey dear,

● Answer -
Dissolved oxygen content = 112 ppm.


● Explanation -
# Given -
Solvent = water
Solute = oxygen
M = 3.5×10^-3 M

# Solution -
Molality of solution is calculated by -
M = W2×1000 / M2W1
W2/W1 = M2 × M / 1000
W2/W1 = 32 × 3.5×10^-3 / 1000
W2/W1 = 112×10^-6
W2/W1 = 112 ppm

Therefore, dissolved oxygen content in water is 112 ppm.

Hope this helped you...