I charge the same for liquid and powder. But here's the easiest rundown for mixing powder:
Palladium:
25ml-
2.5g Palladium Chloride
1.8g Sodium Chloride (table salt)
100ml-
10g Palladium Chloride
7.2g Sodium Chloride
Heat water to near boiling, then add palladium and salt. Stir to mix well. Should completely disolve within 5 minutes.
Platinum:
25ml-
5g Potassium Chloroplatinite
100ml-
20g Potassium Chloroplatinite
Heat water to 90F, add Platinum crystals and stir. Keep the temperature down to help prevent the formation of red needle-like crystals in the bottom of your storage container.