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Density of 3M of Sodium Thiosulphate is 1.25g/mL. Calculate i percentage of mass of Na2S2O3 ii mole fraction iii molarities of Na2S2O3 iv molalities of Na2S2O3?
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Density of 3M of Sodium Thiosulphate is 1.25g/mL. Calculate i percenta...
Molecular weight of sodium thiosulphate penta-hydrate = 248 ;
1000 ml of 3M solution contains 248 X 3 g thiosulphate ;
1 ml of 3M solution contains (248 X 3)/1000 g or 0.744 g thiosulphate.
Amount of water per ml of aqueous thiosulphate solution
= 1.25 - 0.744 = 0.506 g .
Mole fraction of thiosulphate = (mole of thiosulphate)/(total number of moles)
= (0.744/248) / {(0.744/248) + (0.506/18)}
= 0.003/(0.003 + 0.02811)
= 0.0964 .
Molarity of Sodium & thiosulphate ions:
One molecule of thiosulphate produces 2 atoms of sodium ;
One mole of thiosulphate produces 2 moles of sodium ;
1000 ml of 3M thiosulphate will produce 2 X 3 gram-atoms or 6 gram-atoms of
sodium and 3 moles of thiosulphate ions.
This question is part of UPSC exam. View all Class 11 courses
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Density of 3M of Sodium Thiosulphate is 1.25g/mL. Calculate i percenta...
Calculations for Sodium Thiosulphate (Na2S2O3)
Percentage of Mass of Na2S2O3:
- Density of Na2S2O3 = 1.25 g/mL
- Mass = Density x Volume
- Mass of 3M Na2S2O3 = 3 x 1.25 = 3.75 g/mL
- Percentage of mass = (Mass of 3M Na2S2O3 / Total mass) x 100
- Percentage of mass = (3.75 / 3.75) x 100 = 100%
Mole Fraction of Na2S2O3:
- Molar mass of Na2S2O3 = 158.11 g/mol
- Moles in 3M Na2S2O3 = 3 moles
- Total moles in solution = 3 moles
- Mole fraction = Moles of Na2S2O3 / Total moles
- Mole fraction = 3 / 3 = 1
Molarity of Na2S2O3:
- Molarity = Moles of Na2S2O3 / Volume of solution in liters
- Moles of Na2S2O3 = 3 moles
- Volume of 3M Na2S2O3 = 3 L
- Molarity = 3 / 3 = 1 M
Molality of Na2S2O3:
- Molality = Moles of Na2S2O3 / Mass of solvent in kg
- Mass of 3M Na2S2O3 in 3L = 3 x 1.25 = 3.75 kg
- Molality = 3 / 3.75 = 0.8 m
These calculations show that the percentage of mass of Na2S2O3 in a 3M solution is 100%, the mole fraction is 1, the molarity is 1M, and the molality is 0.8m. These values are important for understanding the composition and concentration of the solution.
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Density of 3M of Sodium Thiosulphate is 1.25g/mL. Calculate i percentage of mass of Na2S2O3 ii mole fraction iii molarities of Na2S2O3 iv molalities of Na2S2O3?
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Density of 3M of Sodium Thiosulphate is 1.25g/mL. Calculate i percentage of mass of Na2S2O3 ii mole fraction iii molarities of Na2S2O3 iv molalities of Na2S2O3? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Density of 3M of Sodium Thiosulphate is 1.25g/mL. Calculate i percentage of mass of Na2S2O3 ii mole fraction iii molarities of Na2S2O3 iv molalities of Na2S2O3? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Density of 3M of Sodium Thiosulphate is 1.25g/mL. Calculate i percentage of mass of Na2S2O3 ii mole fraction iii molarities of Na2S2O3 iv molalities of Na2S2O3?.
Density of 3M of Sodium Thiosulphate is 1.25g/mL. Calculate i percentage of mass of Na2S2O3 ii mole fraction iii molarities of Na2S2O3 iv molalities of Na2S2O3? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Density of 3M of Sodium Thiosulphate is 1.25g/mL. Calculate i percentage of mass of Na2S2O3 ii mole fraction iii molarities of Na2S2O3 iv molalities of Na2S2O3? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Density of 3M of Sodium Thiosulphate is 1.25g/mL. Calculate i percentage of mass of Na2S2O3 ii mole fraction iii molarities of Na2S2O3 iv molalities of Na2S2O3?.
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