Question

A liter of sea water (which weighs `1030 g`) contains about `6xx10^(-3)g` of dissolved oxygen `(O_(2))`, such a small concentration can be exoressed as ___ ppm of sea waer
A. `5.8`
B. `4.8`
C. `6.8`
D. `3.8`

Answer 1

Correct Answer - 1
For solution with very low concentration, units such as parts per million (ppm) or parts per billion `(ppb)` can be used.
ppm`=("mass of solute")/("mass of solution")xx10^(6)`
`=(6xx10^(-3)g)/(1030 g)xx10^(6)`
`=5.8`
i.e., `5.8 g per 10^(6) g` i.e., a million gram of sea water.