The pKa of phenol (C6H5OH) is 9.95. Suppose that the composition of the mixture somewhere between 25% and 75% NaC6H5O by mass. If 1.000 g of the sample mixture, dissolved in enough water to make 20.00 mL of solution, is going to be titrated with 0.100-M HCl, which of the indicators listed in this lab would be the best for identifying the equivalence point? Justify your answer with clear reasoning and any necessary calculations.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

the correct answer would be d. hope this !