formula generala: CH₃-(CH₂)n-CH₂-SO₃⁻Na⁺
Mdetergent=M[tex] C_{n+2} H_{2n+5}S O_{3} Na[/tex]=12(n+2)+2n+5+32+48+23=14n+132
14n+132..................100%
32.........................11,76%
14n+132=3200/11,76=272g => 14n=140 => n=10
formula: CH₃-(CH₂)₁₀-CH₂-SO₃⁻Na⁺