15. What is the volume of the solution that would result by diluting 70.00 mL of 0.0913 M NaOH to a concentration of 0.0150 M?(A)466 mL(B)489 mL(C)426 mL(D)504 mL

21. Which of the following statements about buffer solution is NOT true?(A)It resists changes in pH by dilution(B)It resists changes in pH by small addition of acids or bases(C)The most effective buffer solution contains approximately equal concentration of conjugate acid-base pair(D)A concentrate sulfuric acid is a good buffer solution