One liter of a solution contains 0.120 moles of benzoic acid c6h5cooh (ka = 6.5 x 10-5) and 0.105 moles of sodium benzoate c6h5coona. a) calculate the ph of this solution. b) calculate the ph of the resulting solution after adding 100 ml of 1.20 m solution of naoh to the starting solution; c) calculate the ph of the resulting solution after adding 100 ml of 0.100 m hcl solution to the starting solution.

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.