How do you convert mg l to percent?

Answer 1

mg/l is milligrams per litre….or milligrams in one litre of water…

this is a weight by volume relationship with mg the weight and litre the volume….

For considering percentages, we need both units to be of same dimension

i.e. weight by weight or volume by volume

that means you have to convert mg/l to either mg/g or ml/l

we consider converting to mg/g (or any other WEIGHT unit)

Converting mg/l to mg/g or mg/Kg

As you know density of water is 1 gm/ml…..which means when you take 1ml of water it will be 1 gram

So if you take 1000 ml it will be 1000 grams

Or 1 litre of water will weigh 1 kg

Which means you can write mg/l as mg/kg (as 1 litre of water is 1kg)

So suppose you got chloride content in soil as 34 mg/l then you can also say it is 34 mg/kg

Now mg/kg is also known as 1ppm i.e. 1mg/kg = 1mg/1000grams= 1mg/1000000 mg (we have converted everything into milligrams)

So all that remains is 1/1000000 or 1/ 1 million or 1 part per million or 1ppm

Percentage is parts per hundred

So if a chemical has concentration of 34 parts in a million, how much will it be in just hundred

So in 1 lakh it will be 3.4, In 10000 there will be 0.34, In 1000 there will be 0.034 and in 100 there will be 0.0034

Or

34 mg/ kg will be 34 mg / 1000000 mg

So 34 mg is concentration in 1000000 mg

So % will be 34 x 100

___________ = 0.0034%

1000000