Solutions
0.005 molar - dissolve 0.28 g in distilled water and dilute to 1 liter.
0.01 molar - dissolve 0.56g in distilled water and dilute to 1 liter.
0.02 molar - dissolve 1.12g in distilled water and dilute to 1 liter.
0.04 molar - dissolve 2.24g in distilled water and dilute to 1 liter.
References: Salvatore Engel Di-Mauro, July 2001, Selected laboratory
procedures for investigating general soil characteristics and acidification
processes, Manuscript