Vapour density of PCl5 is 104.25 at toC. Then degree of dissociation of PCl5 is. (Mw = 208.5
Question
Solution
To find the degree of dissociation of PCl5, we need to use the concept of vapor density.
Step 1: Calculate the molar mass of PCl5. Given that the molar mass (Mw) of PCl5 is 208.5 g/mol.
Step 2: Determine the vapor density of PCl5. The vapor density is given as 104.25 at a certain temperature (toC).
Step 3: Calculate the molar mass of the gas that is actually present in the vapor. The molar mass of the gas can be calculated using the formula: Molar mass = (Vapor density x Mw) / 22.4.
Step 4: Calculate the number of moles of PCl5 that have dissociated. This can be done by subtracting the number of moles of the gas present in the vapor from the number of moles of PCl5 initially present.
Step 5: Finally, calculate the degree of dissociation using the formula: Degree of dissociation = (moles of PCl5 dissociated / moles of PCl5 initially present) x 100.
By following these steps, you can determine the degree of dissociation of PCl5.
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