The swelling and equilibrium mechanical behaviour of networks of copolymers of acrylamide (AAm) with a ionic crosslinker - sodium salt of 2,2-bisacrylamidopropionic acid (I) in water-ethanol mixtures was investigated. Two series of networks were prepared. While in series 1 AAm and ionic crosslinker were copolymerized (mole fraction x(I) = 0.005 to 0.1), in series 2, AAm, ionic crosslinker and non-ionic crosslinker - methylenebisacrylamide (MBAAm) - were copolymerized in such way that X(I)+x(MBAAm) = 0.05 (x(I) varied from 0 to 0.05). In the region x(I) greater-than-or-equal-to 0.01 the phase transition was observed for both series. As expected, for networks of series 2 with constant crosslinker concentration the extent of transition (jumpwise change of the volume of the gel) increases with increasing charge concentration, x(I). On the other hand, for samples of series 1 this extent slightly decreases with x(I) which means that the effect of increasing crosslinking density on the swelling is greater than that of increasing charge concentration. The critical ethanol concentration at which collapse takes place, e(c), increases with x(I) in both series. The jumpwise change in the gel volume is accompanied by a similar change in the equilibrium modulus of the gel.