Question
What is the decreasing order of reactivity of hydrogen halides in the conversion of ROH into RX?
Solution
When alcohols react with a hydrogen halide, a substitution occurs, producing an alkyl halide and water.
R-OH +H-X → R-X + H-OH
The decreasing order of reactivity of hydrogen halide is HI > HBr > HCl
R-OH +H-X → R-X + H-OH
The decreasing order of reactivity of hydrogen halide is HI > HBr > HCl