Dear Mac,
Using the example you presented, first you want to be sure that all units are the same:
30g is equivalent to 30, 000 mg
1000mg in 1ml
30,000mg in x ml
Cross multiplying,
x = ( 30,000 x 1)/1000 = 30 ml of water.
Alternatively,
1000mg/ml is equivalent to 1g/ml
1g in 1ml
30g in x ml
x = (30 x 1)/1 = 30 ml of water.
I hope this is helpful!
The question is wrong. Considering a density of 1 g/mL (1000mg/mL) or a little higher, a quantity of 1000 mg of your material plant represents all your sample. So, you no longer have added water. Please think again to your question. In the exemple above, the final sample has 30g sample+30 g water =60, so the concentration is 50% or 500mg/mL. if you consider the density 1g/mL.
In other words, you cannot dissolve 1000 mg to obtain 1 mL final volume.
Dear Mac,
The final volume will not be 30 mL after adding the plant material and the final concentration will not be 1000 mg/mL. But if you can, try this exercise using any kind of substance . Your concentration represents the amount of plant material in 1000 ml final volume (or in 30 mL). To maintain your volume at 30 mL after adding any substance, it means that your substance has the volume = 0. Or the volume of water is not 30. Sorry, I don't know how to explain it better.
Hi Mac,
I may have to disagree with that literature. Dissolving 30g in 100 ml gives you a concentration of either 0.3 g/ml or 300 mg/ml.
1000 mg/ml can be achieved by either dissolving 300g in 300 ml or 100g in 100 ml.
Kind regards,
Chigozie
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