What is the nitric acid – water composition by mass, respectively, for the components to form an azeotrope?

What is the nitric acid – water composition by mass, respectively, for the components to form an azeotrope? Correct Answer 68% – 32%

Experimentally, it is determined that nitric acid and water form a constant boiling azeotrope at 68% – 32% by mass composition, respectively. Here, it becomes impossible to separate water and nitric acid by distillation methods. Thus, concentrated sulfuric acid is used for dehydration and removal of water.
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