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A 15.0mL solution of H2SO3 is neutralized by 12.0mL of a standardized 1.00M NaOH solution. What is the concentration of the H2SO3 solution?

Please reply with the steps on how to do this question so I can learn. I can't find examples or anything related in my textbooks and I take it via correspondence, so no class instructor to ask for help. Thank you

  • Chemistry -

    H2SO3 + 2NaOH ==> Na2SO3 + 2H2O

    mols NaOH = M x L = ?
    Convert mols NaOH to mols H2SO3 so
    mols H2SO3 = 1/2 mols NaOH (look at the coefficients).
    Now M H2SO3 = moles H2SO3/L H2SO3. Solve for M H2SO3.

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