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The increase in boiling point of a solution containing 0.6 gram urea in 200 gram water is 0.50 Celsius.Find the molal elevation constant.a) 1.0 K kg mole-1 . b)10 K kg mole c)10 K gram mol-1. d)10 K kg mole-1? plzz ans me
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The increase in boiling point of a solution containing 0.6 gram urea i...
Given Data:
- Mass of urea (m) = 0.6 g
- Mass of water (W) = 200 g
- Increase in boiling point (ΔTb) = 0.50 °C
Step 1: Calculate the moles of urea
1. Calculate the molar mass of urea (CO(NH₂)₂) = 60.06 g/mol
2. Calculate the moles of urea using the formula:
Moles = Mass / Molar mass
Moles = 0.6 g / 60.06 g/mol
Moles = 0.00999 mol
Step 2: Calculate the molality of the solution
1. Calculate the mass of water in kg:
Mass of water = 200 g = 0.2 kg
2. Calculate the molality using the formula:
Molality (m) = Moles of solute / Mass of solvent in kg
Molality = 0.00999 mol / 0.2 kg
Molality = 0.04995 mol/kg
Step 3: Calculate the molal elevation constant (Kf)
1. Use the formula for boiling point elevation:
ΔTb = Kf * m
0.50 °C = Kf * 0.04995 mol/kg
2. Solve for Kf:
Kf = 0.50 °C / 0.04995 mol/kg
Kf ≈ 10 K kg mol⁻¹
Therefore, the molal elevation constant for the given solution is approximately 10 K kg mol⁻¹. Hence, the correct answer is option d) 10 K kg mole⁻¹.
- Mass of urea (m) = 0.6 g
- Mass of water (W) = 200 g
- Increase in boiling point (ΔTb) = 0.50 °C
Step 1: Calculate the moles of urea
1. Calculate the molar mass of urea (CO(NH₂)₂) = 60.06 g/mol
2. Calculate the moles of urea using the formula:
Moles = Mass / Molar mass
Moles = 0.6 g / 60.06 g/mol
Moles = 0.00999 mol
Step 2: Calculate the molality of the solution
1. Calculate the mass of water in kg:
Mass of water = 200 g = 0.2 kg
2. Calculate the molality using the formula:
Molality (m) = Moles of solute / Mass of solvent in kg
Molality = 0.00999 mol / 0.2 kg
Molality = 0.04995 mol/kg
Step 3: Calculate the molal elevation constant (Kf)
1. Use the formula for boiling point elevation:
ΔTb = Kf * m
0.50 °C = Kf * 0.04995 mol/kg
2. Solve for Kf:
Kf = 0.50 °C / 0.04995 mol/kg
Kf ≈ 10 K kg mol⁻¹
Therefore, the molal elevation constant for the given solution is approximately 10 K kg mol⁻¹. Hence, the correct answer is option d) 10 K kg mole⁻¹.
Community Answer
The increase in boiling point of a solution containing 0.6 gram urea i...
Molality= 0.6×1000/60×200=0.05..then ..kb=∆tb/m = 0.5/ 0.05 =10
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The increase in boiling point of a solution containing 0.6 gram urea in 200 gram water is 0.50 Celsius.Find the molal elevation constant.a) 1.0 K kg mole-1 . b)10 K kg mole c)10 K gram mol-1. d)10 K kg mole-1? plzz ans me
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The increase in boiling point of a solution containing 0.6 gram urea in 200 gram water is 0.50 Celsius.Find the molal elevation constant.a) 1.0 K kg mole-1 . b)10 K kg mole c)10 K gram mol-1. d)10 K kg mole-1? plzz ans me for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about The increase in boiling point of a solution containing 0.6 gram urea in 200 gram water is 0.50 Celsius.Find the molal elevation constant.a) 1.0 K kg mole-1 . b)10 K kg mole c)10 K gram mol-1. d)10 K kg mole-1? plzz ans me covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The increase in boiling point of a solution containing 0.6 gram urea in 200 gram water is 0.50 Celsius.Find the molal elevation constant.a) 1.0 K kg mole-1 . b)10 K kg mole c)10 K gram mol-1. d)10 K kg mole-1? plzz ans me.
The increase in boiling point of a solution containing 0.6 gram urea in 200 gram water is 0.50 Celsius.Find the molal elevation constant.a) 1.0 K kg mole-1 . b)10 K kg mole c)10 K gram mol-1. d)10 K kg mole-1? plzz ans me for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about The increase in boiling point of a solution containing 0.6 gram urea in 200 gram water is 0.50 Celsius.Find the molal elevation constant.a) 1.0 K kg mole-1 . b)10 K kg mole c)10 K gram mol-1. d)10 K kg mole-1? plzz ans me covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The increase in boiling point of a solution containing 0.6 gram urea in 200 gram water is 0.50 Celsius.Find the molal elevation constant.a) 1.0 K kg mole-1 . b)10 K kg mole c)10 K gram mol-1. d)10 K kg mole-1? plzz ans me.
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