Cm = niu/Vs, Vs = 40 ml = 0,04 L
=> niu = CmxVs = 0,1x0,04 = 0,004 moli
0,208 g 0,004 moli
HOOC-R-COOH + 2NaOH => NaOOC-R-COONa + 2H2O
miu 2
=> miu = 0,208x2/0,004 = 104 g/mol
=> R-(COOH)2 , miu = R+45x2
=> R = 104 - 90 = 14 => R = CH2
=> acidul este HOOC-CH2-COOH, acidul propandioic (malonic)