Titration of 0.1 M HCl against a 25mL liquor mixture of NaOH and Na2CO3 using phenolphthalein indicator requires 17.5mL of the acid for the endpoint.  After this, methyl orange was added and 3.5mL of HCl was again required for the next endpoint.   A. Write separate equations for reactions for the two endpoints  B. Calculate the amount in milligrams of NaOH and Na2CO3 in the mixture

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