Ethyl n-butyl ether can react with concentrated hydrobromic acid (concentration is about 40%) to produce ethyl bromide and n-butyl bromide, but it does not produce alcohol (even if the alcohol is in concentrated hydrobromic acid, it will be converted into bromoalkane, which needs to be hydrolyzed in water or alkaline aqueous solution to obtain alcohol). The reaction formula is as follows:

Ch3ch2oc (CH3) 3+2hbr (concentrated) → ch3ch2br+(CH3) 3cbr+H2O