acid = CxH(2x-2)O4
sarea de Ca = CxH(2x-4)O4Ca M = 14x + 100
4o·100/M = 25,4 M = 4000/25,4
14x + 100 = 4000/25,4
355,6x + 2540 = 4000
355,6x = 1460 x = 4
acid = HOOC-CH2-CH2-COOH (acid succinic)
succinat de Na = HOOC-CH2-CH2-COONa
%Na = 23·100/140 = 57,5%