posted by maya .
You have to design a buffer based on one of the systems below
System 1: HA1 and A1-1 K= 4 E-3
System 2: HA2 and A2-1 K= 5 E-4
System 3: HA3 and A3-1 K= 6 E-5
For the following parts assume that the buffer above in system2 has been constructed with [HA] =1M and that there is no change in volume when acids or bases are added
c) Find the new pH if .03 moles of HCl is added to 100 ml of buffer in system 2
d) Find the maximum mass of NaOH which could be added to 100 ml of the original buffer without changing the pH by more than .7 pH units
You have no initial pH listed and there is no way to calculate it since you also don't have (A2^-) listed.