Question

Using phenolphthalein as indicator, 25ml of a solution contains Na2CO3 and NaOH mixture requires 19.5ml of 0.001M HCL for the end point. Addition Methyl orange indicator to the solution at the phenolphthalein end point requires 6.4ml of the same HCL for end point. Calculate concentration of NaOH in g per litre

Answer 1

Answer:

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