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Chapter 3: Q3.102P (page 89)

A sample of concentrated nitric acid has a density of 1.41 g/mL and contains 70.0% HNO3 by mass. (a) What mass of HNO3 is present per liter of solution? (b) What is the molarity of the solution?

Short Answer

Expert verified
  1. The mass of HNO3that is present per liter of the solution is 987g HNO3/L solution.
  2. The molarity of the solution is 15.7 M HNO3.

Step by step solution

01

Finding the mass of HNO3 is present per liter of solution

a. The mass of theHNO3can be expressed as:

Mass  of  HNO3 (1 L solution)=1.41 g solution10-3 L solution×70 g HNO3100 g solution                                                                 =987 g HNO3/L solution.

02

Finding molarity of the solution

b. Now, multiply the reciprocal of the molar mass to find the molarity

Molarity=987 g HNO3L solution×mol HNO363.01 g HNO3                     =15.7 HNO3.

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