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Weak acid and base equilibria

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The ionization of the weak acid HNOA2 in water is represented by the equation above.
What is the percent ionization of HNOA2 in 1.5MHNOA2(aq)? (For HNOA2(aq), Ka=5.6×104.)
Write your answer using two significant figures.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi