[APD] density of MgSO4, Ca(NO3)2 solutions

["Steve Pushak" <teban at powersonic_bc.ca>]

Does anyone know the specific gravity of 1 molar solutions of MgSO4 and
Ca(NO3)2?

The reason I ask is that both salts are hygroscopic & therefore its
difficult to know how much you have by weighing the crystals.
Unfortunately the measurement error in a hydrometer is probably going to
be on the order of 10% or more. I could be more precise with a
volumetric flask & other lab glassware since I have a high quality scale
but probably don't need to be that fussy when dealing with plant
fertilizer solutions.

Steve P

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