A student prepared 750 mL of a stock solution of 0.1 M NaOH from solid NaOH and deionized water. To standardize the NaOH solution it was titrated against 20.00 mL aliquots* of 0.1134 M HCl to a light pink endpoint using phenolphthalein as an indicator. The average titre for 3 titrations was 22.78 mL of NaOH.
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