8. the following question is seen in your lab manual under pre-lab exercise. you will prepare two acidic buffer solutions (hc, h,o,/ nac, h0) of the same ph (ph-4), but different concentrations of the components, use the henderson-hasselbalch equation to perform the following calculations the k, of acetic acid is 1.8 x 10%. review your calculations with your instructor before preparing the buffer solutions buffer a: calculate the mass of solid sodium acetate, nac h, o required to mix with 100.0 ml of 0.im acetic acid, hc, h,0, to prepare a ph 4 buffer. record the mass in your data table. buffer b: calculate the mass of solid sodium acetate, nac2h, o required to mix with 100.0 ml of 1.0m acetic acid, hc2h o to prepare a ph 4 buffer. record the mass in your data table.