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?

Question

1839 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-05-07T22:06:25

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,

#0.030"mL" * (0.550"mol")/"L" approx 1.65*10^-2"mol"#

The same goes for the initial hydroxide added.