1.0 g of a monobasic acid when completely acted upon Mg gave 1.301 g of anhydrous Mg salt. Equivalent weight ofacid is

Ew of acidEw of salt of Mg=Weight of acidWeight of saltMg + 2HCl (monobasic acid) → MgCl2+H2Let Ew of acid = Ew of H + Ew of acid radical∴Ew of salt of Mg = Ew of Mg + Ew of acid radical∴Ew acidEw of Mg salt=weight of acidWeight of Mg salt⇒Ew of H + Ew of acid radical (E)Ew of Mg + Ew of acid radical (E) =1.01.301⇒1+E12+E=1.01.301∴E=35.54∴Ew of acid = Ew of H + Ew of acid radical=1+35.54 = 36.54