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A Buffer Is Prepared by Dissolving 70 Millimoles of Solid

Question 6

Multiple Choice

A buffer is prepared by dissolving 70 millimoles of solid NaOH in 500.0 mL of solution with a concentration of 50 mM H2A.Which of the following are NOT true for the buffer?
I After reaction there is 30 mmol HA− and 20 mmol A2− in solution.
II pH is calculated using A buffer is prepared by dissolving 70 millimoles of solid NaOH in 500.0 mL of solution with a concentration of 50 mM H<sub>2</sub>A.Which of the following are NOT true for the buffer? I After reaction there is 30 mmol HA<sup>−</sup> and 20 mmol A<sup>2</sup><sup>−</sup> in solution. II pH is calculated using . III After reaction there is 50 mmol HA<sup>−</sup> and 20 mmol NaOH in solution. IV pH is calculated using . V pH = 14 - pOH where pOH is calculated from excess OH<sup>−</sup>. A) III,IV,and V B) II,III,IV,and V C) 1,III,and IV D) I,II,and V E) I and II .
III After reaction there is 50 mmol HA− and 20 mmol NaOH in solution.
IV pH is calculated using A buffer is prepared by dissolving 70 millimoles of solid NaOH in 500.0 mL of solution with a concentration of 50 mM H<sub>2</sub>A.Which of the following are NOT true for the buffer? I After reaction there is 30 mmol HA<sup>−</sup> and 20 mmol A<sup>2</sup><sup>−</sup> in solution. II pH is calculated using . III After reaction there is 50 mmol HA<sup>−</sup> and 20 mmol NaOH in solution. IV pH is calculated using . V pH = 14 - pOH where pOH is calculated from excess OH<sup>−</sup>. A) III,IV,and V B) II,III,IV,and V C) 1,III,and IV D) I,II,and V E) I and II .
V pH = 14 - pOH where pOH is calculated from excess OH−.


A) III,IV,and V
B) II,III,IV,and V
C) 1,III,and IV
D) I,II,and V
E) I and II

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