Basic analytical chemistry UE Past Papers Questions.


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(3899) Question Category: True OR False

The solubility product , K_{sp} is the equilibrium constant for the equilibrium established between a solid solute and its ions in a saturated solution.

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(3900) Question Category: True OR False

Constant determinate errors become less significant with increased size of the sample.

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(3901) Question Category: True OR False

The precise results are always accurate.

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(3902) Question Category: Multiple choices

Consider the following equilibrium HC_{2}O_{4}^{-}+HCO_{3}^{-} ightleftharpoons H_{2}CO_{3}+C_{2}O_{4}^{2-}

Which of the following correctly identifies the order of Bronsted -Lowry acids and bases?

HC_{2}O_{4}^{-} ,HCO_{3}^{-}, H_{2}CO_{3},C_{2}O_{4}^{2-}

  1. base acid acid base
  2. acid base base acid
  3. acid base acid base
  4. base acid base acid

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(3903) Question Category: Multiple choices

Which of the following is the weakest acid?

  1. HK(K_{a}=6.8 imes 10^{-4})
  2. Acetic acid(K_{a}=1.8 imes 10^{-5})
  3. HNO_{2}(K_{a}=4.5 imes 10^{-4})
  4. HClO(K_{a}=3.0 imes 10^{-8})
  5. HCN(K_{a}=4.9 imes 10^{-10})

Answer / Solution

UNSOLVED

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