11) Determine the concentration of the solution made when 4g of Ca(NO3)2 is dissolve in 200ml...

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Question

Answer 1

Answer #1

11)

mass of Calcium Nitrate uded in 200 ml of water = 4 g

So in one liter of water it should be mass of Calcium nitrate 5 times of mass present in 200 ml of water .

4g * 5 = 20 g should present i 1 liter of water .

Concetration of calcium nitrate in g/L = 20 g/L

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Molar mass of Calcium nitrate = 187.56 g/mol

mass of Calcium nitrate calculated as above in 1 L of water = 20 g

So moles of Calcium nitrate = mass / MW

= 20 g / 187.56 g/mol

= 0.1066 mol present in 1 L of water.

Concetration of copper nitrate in 1 L of water = 0.1066 mol per Liter

Answer 2

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