Question

A certains 16.9 gog HNO3 dissolved in 125 ml of solution water is addeduntil the valume is 175 ml.What is the molarity of HNO3 in the final solution?​

Answer 1

Answer:

A certain solution contains 16.9 g of HNO3 dissolved in 125 mL of a substantive solution. Water is added until the volume is 175 mL. What is the molarity of Hno3 in the final solution?

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Trevor Hodgson

Answered January 29, 2021

A certain solution contains 16.9 g of HNO3 dissolved in 125 mL of a substantive solution. Water is added until the volume is 175 mL. What is the molarity of Hno3 in the final solution?

In honestly I have no idea what is meant by a substantive solution - and I have no idea as to its significance in the problem

But you have 16.9 g HNO3 dissolved in 175 mL solution:

Calculate mass of HNO3 in 1.0 L solution

That is 1000 mL/L / 175 mL * 16.9 g = 96.57 g HNO3 /L solution

Molr mass HNO3 = 63.0 g/mol

Mol HNO3 in 96.57 g HNO3 = 96.57 g / 63.0 g/mol = 1.53 mol HNO3 dissolved in 1000 mL or 1.0 L solution

Final molarity = 1.53 M

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