Question

Unit conversion for Soluble Reactive Silica (SRSi)

1. 25.5 μmol L^-1 to (mg l-1)
2. 0.82 (mg l-1) to μmol L^-1

Answer 1

$M(SiO_2)=28+16x2=60 g/mol$

$25 mkmol/L=25 x10^{-6} mol/L=25x10^{-6}x60=1500x10^{-6} g/L=1.5 mg/L$

2.$0.82 mg/L=0.82x10^{-3} g/L=0.82x10^{-3}/60=0.0137 x10^{-3}mole/L=13.7 mkmole/L$