The molar concentration of a 20.0% 9m/m) solution of aqueous ammonia (NH3) is 10.51 M. What...

The molar concentration of a 20.0% 9m/m) solution of aqueous ammonia (NH3) is 10.51 M. What is the density of this solution ?

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Expert Solution

Molar concentration of aqueous ammonia solution = 10.51 M

Moles of ammonia in 1 L solution = 10.51

Molar mass of ammonia = 17.031 g/mol

Mass of ammonia = 17.031 * 10.51

= 178.99 g

Mass % of solution = 20%

20 g NH3 is present in 100 g solution.

So, 178.99 g ammonia will be present in = 100/20 * 178.99

= 894.95 g solution

Mass of solution = 894.95 g

Volume of solution = 1 L = 1000 mL

Density of solution = Mass / Volume

= 894.95 / 1000

Density of solution = 0.895 g/mL

queen_honey_blossom answered 1 year ago

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