C-12-Q090mediumsingle_mcqC12H25OH+H2SO4→?\mathrm{C_{12}H_{25}OH + H_2SO_4 \to ?}C12H25OH+H2SO4→?aC12H25HSO4+H2O\mathrm{C_{12}H_{25}HSO_4 + H_2O}C12H25HSO4