If 300 ml of 0.30 M phosphate buffer at pH 6.8 is added to 200 ml of 0.075 M NaOH, what is the resulting pH of the solution? pK = 6.8.

If 300 ml of 0.30 M phosphate buffer at pH 6.8 is added to 200 ml of 0.075 M NaOH, what is the resulting pH of the solution? Round the answer to one decimal place. The dissociation of H2PO4" (monobasic) to HPO4-2 (dibasic) has a pk of 6.8