Densities (ρ), refractive indices (nD) and electrical conductivities (κ) of ethylammonium acetate (N2Ac) protic ionic liquid+ water and propylammonium acetate (N3Ac) protic ionic liquid+ water binary mixtures over the entire composition range were measured at 298.15 K under atmospheric pressure. The excess molar volumes (VE), apparent molar volumes (Vϕi), partial molar volumes (V¯ m, i) and excess partial molar volumes (V¯ m, iE) of the ...