Question

Calculate the concentration of nitric acid in moles per litre in a sample which has a density, 1.41 g ml–1and mass per cent of nitric acid in it being 69%.

Solution

Correct option is

15.44 M

 

Mass percent of 69% means that 100 g of nitric acid solution contain 69 g of nitric acid by mass.

Molar mass of nitric acid (HNO3) = 1 + 14 + 48 = 63 g mol–1

∴                 

             Volume of 100 g nitric acid solution =

                                                

∴         Conc. Of HNO3 in moles per litre 

SIMILAR QUESTIONS

Q1

A solution is prepared by adding 2 g of a substance A to 18 g of water. Calculate the mass percent of the solute.

Q2

The density of 3 M solution of NaCl is 1.25 g mL–1. Calculate the molalityof the solution.

Q3

How many grams of NaOH should be dissolved to make 100 cm–3 of 0.15 M NaOH solution? 

Q4

Calculate the number of oxalic acid molecules in 100mL of 0.02 N oxalic acid solution

Q5

Calculate the molarity of water if its density is 100 kg/m3

Q6

Calculate the percentage of cation in ammonium dichromate.

Q7

Calculate the percentage of water of crystallisation in the sample of blue vitriol (CuSO4.5H2O)

Q8

Calculate the mass of sodium acetate (CH3COONa) required to make500mL of 0.375 molar aqueous solution. Molar mass of sodium acetate is 82.0245 g mol–1

Q9

How much copper can be obtained from 100 g of copper sulphate(CuSO4)? (Atomic mass of Cu =63.5amu) 

Q10

What is the concentration of sugar if its 20 g are dissolved in enough water to make a final volume up to 2 L?