c = md*100/ms
md1 = 700*90/100 = 630 g acid
md2 = 800*85/100 = 680 g acid
md3 = 650*65/100 = 422,5 g acid
md4 = 850 g acid
md5 = md1+md2+md3+md4 = 2582,5 g acid
ms5 = ms1+ms2+ms3+md4+m apă = 700+800+650+850+200 = 3200 g soluție
c5 = md5*100/ms5 = 2582,5*100/3200 = 80,70%
ro = m/V
m = ro*V = 50*0,8 = 40 g alcool
ms = m iod + m alcool = 10+40 = 50 g soluție
c = md*100/ms = 10/50 * 100 = 20%
