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A 26.8 mL sample of an unknown HClO4 solution requires 46.8 mL of 0.101 M NaOH for complete neutralization. What was the concentration of the unknown HClO4 solution? The neutralization reaction is shown below.

HClO4(aq) + NaOH(aq) H2O(l) + NaClO4(aq)

i got .00473 M HClO4 but it was wrong

  • chem -

    moles NaOH = M x L = ??
    Look at the equation and use the coefficients to convert moles NaOH to moles HClO4. It's 1:1
    Then M HClO4 = moles HClO4/L HClO4.

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