Question

A mixture of ethanol and nitric acid, called nital, is an industrial etching agent A student prepared a 20.0 mL solution of nital using 0.70
mL of nitric acid of unknown concentration and 19.3 mL of 98% (w/w) ethanol. The student determined by titration that the final
concentration of nitric acid in the nital etching agent was 4.0 % by mass. The density of 98 % ethanol was 0.79 g ml and the density
of the unknown concentration of aqueous HNO3 was 1.4 g ml? What was the original concentration of HNO3, in w/w of the 0.70
mL reagent the student used for the nital solution preparation?Round off your answer to the nearest integer
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Answer 1

Answer:

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