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Which of the following is/are present in a reagent bottle labeled 1.0 M H2SO4?

I. H2SO4
III. SO4-2

A. I only
B. I and II
C. II and III
D. I, II, and III

  • Chemistry -

    All are present.

  • Chemistry -

    apparently the answer is C, yet i cannot find any explanation to it...

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