I am trying to figure out how to use 'liter^-1', as in 2 gram/liter^-1 (2 gl^-1). I know if the ratio was 2 g/l the resulting ppm would be 2000, but I do not know how to use the negative exponent. If someone could explain the process or offer an equation/formula I would be most grateful! I would like to convert the solution to g/l (or mg/l) so I can calculate the ppm.

If I calculate l^-1 I get 1000m^-3, which I do not see as being useful. I am trying to figure out how to mix two different substances: CaCl2 @ 8 g/l^-1 and alkyl polyglucoside @ 2 g/l^-1. For a donor solution (I think that is the right term?) I am going to use one liter of deionized water for mixing the CaCl2. To that mix I will add chelated Ca and chelated Mg along with phosphorus salts (anions).

P.S. This is not homework, I am in college but this is something I am working on by myself as a hobby.

Thank you for you any help

**Edited by humphry, 07 April 2009 - 06:00 PM.**