50 ml of 1M oxalic acid (molar mass=126) is shaken with 0.5g of wood charcoal.the final concentration of the solution after adsorption is 0.5M. What is the amount of oxalic acid adsorbed per gram of carbon?

Initial amount of oxalic acid present in 50ml = 126/1000*50 = 6.3g Amount of oxalic acid in 50ml after adsorption = 3.15 g Amount of oxalic acid adsorbed per gram of charcoal = 3.15 * 2 = 6.3 g.
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