17. Solving a chemistry problem
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4. A weighing of 0.5248 g of epoxy resin was dissolved in acetone and 50.00 ml of 0.1 M HCl solution was added. For titration of excess acid, 18.45 ml of NaOH with a titer of 0.004060 g/ml were used. Calculate the mass fraction (%) of epoxy groups in the resin. Epoxy groups=41.
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