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Dosing concentration
Before dumping stuff into my tank, I am trying to find out its
percentage by weight in order to calculate target ppm.
1)Label on chemical container:
MAGNESIUM SULPHATE MgSO4.7H2O = 246.47 500g
Assay (ex Mg) min 99%
Chloride max 0.02%
Arsenic max 0.0005%
Iron max 0.001%
Lead max 0.0005%
Zinc max 0.001%
*QUESTION: How I do know the percentage by weight of magnesium?
Is it 99%?
2)Label on chemical container:
POTASSIUM NITRATE KNO3 Mol Wt. 101.10 500g
Assay min 99%
Maximum limits of impurities
Chloride 0.02%
Sulphate 0.02%
Lead 0.001%
Sodium 0.5%
*QUESTION: Do all ppl do, say, add 1/4 tsp and measure NO3 by test kit?
Would it be better to know the percentage of nitrate by looking at those
figures? But how?
3)Label on chemical container:
POTASSIUM SULPHATE K2SO4 = 174.26 500g
Acidity (as H2SO4) max 0.01%
Alkalinity (as KOH) max 0.01%
Chloride max 0.003%
Nitrate to pass test
Heavy metals (as Pb) max 0.001%
Iron max 0.001%
Calcium max 0.006%
Magnesium max 0.002%
Sodium max 0.04%
Arsenic max 0.00001%
Assay (after drying at 100C) min 99%
*QUESTION: How do I get percentage by weight of potassium?
BTW, hope I am asking the *right* questions.
rgds.