2022 IB Diploma Extended Essays

wine the same, the pH of the wine should be the same thus enabling the experiment to be fair. If the pH is different, then the endpoint and the volume of NaOH required to neutralise would be different. Ultimately, the TA found would have a larger uncertainty and a different value. The chemicals used was collected from the same bottle for all trials. 0.1M of both were used. Why: wi5h different concentrations, the volume required to neutralise the solution would differ. This because a stronger concentration would require less volume since there are more molecules that can bond with the solution. Therefore, the TA would consequently be lower than ideal.

Concentration of sodium hydroxide (NaOH) and Hydrochloric acid (HCl)

2.2 Materials X1 500ml 0.1M Sodium Hydroxide X2 500ml 0.1M Hydrochloric Acid X2 750ml of white wine X1 pH data logger X1 bottle of phenolphthalein indicator X1 bottle of Bromothymol Blue indicator X3 250ml conical flask X2 100ml beaker X2 50ml beaker X2 retort stand X2 retort stand clamps X1 20ml volumetric pipette and bulb X2 50ml burette X2 funnel X2 white tile X1 bottle of deionised water