Assuming $25$ oC and $420$ ppm CO$2$ in the atmosphere, plot the titration curves for the

following systems.

a$.$ Water $($initially pH $=7)$ that was equilibrated with the atmosphere, and is now closed to

the atmosphere.

b$.$ The same water that was equilibrated with the atmosphere and is now open to the

atmosphere during its titration.

c$.$ Comment on the buffering effects of the atmospheric CO$2.$

$($Note$,$ you will have to produce these figures graphically use the software of your preference,

please write the equations you used to create the plots on a separate piece of paper.$)$