Problem: Select the most acidic compound from the following.A. SO2.B. Al2O3C. CaOD. PbOE. H2O

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We are given compounds that are oxides that can be acidic or basic, depending on the other elements attached to O. 

  • Metals → Basic
  • Non-metal → Acidic
  • Neutral (exeptions) → NO, CO and N2O
  • Amphoteric (exeptions, can be acid or base) 
    •  Elements attached to O 
      • Be, Al, Ga, Sn, Pb, As, In, Sb
    • Water → H2O


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Problem Details

Select the most acidic compound from the following.

A. SO2.

B. Al2O3

C. CaO

D. PbO

E. H2O


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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Acidic and Basic Oxides (Anhydrides) concept. If you need more Acidic and Basic Oxides (Anhydrides) practice, you can also practice Acidic and Basic Oxides (Anhydrides) practice problems.