The boiling point and freezing point has to be calculated. Concept Introduction: The depression in freezing point, the elevation of boiling point and osmotic pressure are together known as colligative properties. The elevation in boiling point can be given by the equation, ΔT=K b m solute Where, ΔT = change in boiling point elevation K b = molal boiling point elevation constant m solute = molality of solute The depression in freezing point can be given by the equation, ΔT=K f m solute Where, ΔT =change in freezing point depression K f = molal freezing point depression constant m solute = molality of solute
The boiling point and freezing point has to be calculated. Concept Introduction: The depression in freezing point, the elevation of boiling point and osmotic pressure are together known as colligative properties. The elevation in boiling point can be given by the equation, ΔT=K b m solute Where, ΔT = change in boiling point elevation K b = molal boiling point elevation constant m solute = molality of solute The depression in freezing point can be given by the equation, ΔT=K f m solute Where, ΔT =change in freezing point depression K f = molal freezing point depression constant m solute = molality of solute
Solution Summary: The author explains that the boiling point and the freezing point are together known as colligative properties. The molarity of ionized Formic acid solution is calculated by the equation.
Interpretation: The boiling point and freezing point has to be calculated.
Concept Introduction: The depression in freezing point, the elevation of boiling point and osmotic pressure are together known as colligative properties.
The elevation in boiling point can be given by the equation,
ΔT=Kbmsolute
Where,
ΔT= change in boiling point elevation
Kb = molal boiling point elevation constant
msolute = molality of solute
The depression in freezing point can be given by the equation,
Lab Data
The distance entered is out of the expected range.
Check your calculations and conversion factors.
Verify your distance. Will the gas cloud be closer to the cotton ball with HCI or NH3?
Did you report your data to the correct number of significant figures?
- X
Experimental Set-up
HCI-NH3
NH3-HCI
Longer Tube
Time elapsed (min)
5 (exact)
5 (exact)
Distance between cotton balls (cm)
24.30
24.40
Distance to cloud (cm)
9.70
14.16
Distance traveled by HCI (cm)
9.70
9.80
Distance traveled by NH3 (cm)
14.60
14.50
Diffusion rate of HCI (cm/hr)
116
118
Diffusion rate of NH3 (cm/hr)
175.2
175.2
How to measure distance and calculate rate
For the titration of a divalent metal ion (M2+) with EDTA, the stoichiometry of the reaction is typically:
1:1 (one mole of EDTA per mole of metal ion)
2:1 (two moles of EDTA per mole of metal ion)
1:2 (one mole of EDTA per two moles of metal ion)
None of the above