1,2,3,4-butane tetracarboxylic acid is a quadroprotic (having 4 protons to give) acid. Thus, 1 normal solution of 1,2,3,4-butane tetracarboxylic acid would have a concentration of 0.25M. If 1 Liters of solution is to be prepared, the mole number of 1,2,3,4-butane tetracarboxylic acid would be 0.25, knowing that its MW=234.16, it would require you to put 0.25*234.16=58.54 grams of 1,2,3,4-butane tetracarboxylic acid into 1 liters of solution.
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