Recent content by brunetteangel

I know a few formulas, but I think I can't use any of them in this task yet, because I don't have enough information. And which formula is used for molar concentration, this one: c (substance) = n (substance) / V (whole solution volume) or this one: b (substance) = n...

Homework Statement Calculate pH of the 1,96% solution of H3PO4 (ρ≈1 g/cm^3). Take in account only the first constant of dissociation (7,5 * 10^-3 mol/cubic dm). The reduction of the concentration of H3PO4 because of dissociation can be ignored. % = 1,96% ρ (H3PO4) ≈1 g/cm^3 K = 7,5 *...