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Describe how to prepare (a) 25mL ascorbic acid stock solution (1000mg/L) from an ascorbic acid reagent...

Describe how to prepare
(a) 25mL ascorbic acid stock solution (1000mg/L) from an ascorbic acid reagent with 98% purity (w/w).
(b) and How would you prepare make a 100mL working solution (100microgram/L) from diluting this stock solution.

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