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    Chemistry The Molecular Nature of Matter
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    Exam 17: Acid-Base Equilibria in Aqueous Solutions
  5. Question
    For H<sub>3</sub>PO<sub>3</sub>, K<sub>a1</sub> = 1
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For H3PO3, Ka1 = 1

Question 50

Question 50

Multiple Choice

For H3PO3, Ka1 = 1.0 × 10-2 and Ka2 = 2.6 × 10-7. Calculate a value for the [H2PO3?] in a 0.500 molar solution of H3PO3.


A) 1.0 × 10-2 mol L-1
B) 6.6 × 10-2 mol L-1
C) 7.1 × 10-2 mol L-1
D) 8.5 × 10-3 mol L-1
E) 3.3 × 10-3 mol L-1

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