Q:

Three of the solutions below have the SAME level of acidity (or alkalinity), the other is different. Which is the different one

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Three of the solutions below have the SAME level of acidity (or alkalinity), the

other is different. Which is the different one?


  1. blood
  2. a neutral solution
  3. a solution with pH = 7
  4. a solution with a hydrogen ion concentration of 10-7 mol/L

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A: Blood has pH in the range 7.35–7.45. The other choices all have

pH = 7.0

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