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A Vitamin C (ascorbic acid) tablet, with a mass of 5.137 g, was completely dissolved in water and made to volume in a 100 mL volumetric flask. A 0.0103 M NaOH solution was used to titrate against this ascorbic acid (C6H8O6) solution. The average (Volume NaOH/Volume C6H8O6) i.e. (Vb/Va) ratio at the endpoint was determined as 11.67. Determine the mass percentage of ascorbic acid in the original tablet. (Mr of ascorbic acid = 176.12 g/mol) The balanced reaction equation is given below. Please provide your answer rounded off to two decimal figures. | 'n Vitamien C (askorbiensuur) tablet, met 'n massa van 5.137 g, is volledig in water opgelos en in 'n volumetriese fles opgemaak tot 'n volume van 100 mL. 'n 0.0103 M NaOH oplossing is gebruik om teen hierdie askorbiensuur (C6H8O6) oplossing te titreer. Die gemiddelde (Volume NaOH/Volume C6H8O6) d.w.s. (Vb/Va) verhouding by die endpunt is vasgestel as 11.67. Bepaal die massapersentasie askorbiensuur in die oorspronklike tablet. (Mr askorbiensuur = 176.12 g/mol) Die gebalanseerde reaksievergelyking word hieronder gegee. Gee asseblief jou antwoord afgerond tot twee desimale syfers. |
| C6H8O6 (aq) + NaOH (aq) → C6H7O6Na (aq) + H2O (ℓ) |
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