A buffer solution is formed when 10.0 #cm^3# of 0.230 mol #dm^-3# aqueous sodium hydroxide are added to 30.0 #cm^3# of 0.550 mol #dm^-3# aqueous propanoic acid. How do you calculate the number of moles of propanoic acid originally present?
I will assume you don't need this solved, but want a starting point since that is what you're asking.
To calculate the moles of propanoic acid, we do a simple stoichiometric calculation,
The same goes for the initial hydroxide added.