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A Rubex tabet, weighing 1.35g, was dissolved in 50mls of water to which 2mls of 4M NaOH was added. This solution was made up to the mark in a 200ml volumetric flask with water. It was found 10mls of this solution required an average titre of 6.50ml of 0.05M HCl for neutralisation.

Show your clear step-by-step Calculation, in order to determine the percentage (two decimal places) of Vitamin C (Ascorbic acid) in this tablet based on these experimental results

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