Cambridge O Level
UCLES 2020 5070/32/O/N/20 1 A weak acid has the formula H 3X. The equation for the reaction between H 3X and sodium hydroxide, NaOH, is shown. 3NaOH + H 3X Na 3X + 3H 2O The concentration of H 3X(aq) is determined by titration with NaOH(aq). Thymolphthalein is used to determine the end-point of the titration. P is H 3X(aq). Q is 0.100 mol / dm ... ................
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