Anonymous
Anonymous asked in Science & MathematicsChemistry · 1 month ago

chem question help?

A 25.0 mL sample of an unknown HClO4 solution requires 42.3 mL of 0.107 M NaOH for complete neutralization. What was the concentration of the unknown HClO4 solution? The neutralization reaction is 

HClO4(aq)+NaOH(aq)→H2O(l)+NaClO4(aq).

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  • 1 month ago

    Moles NaOH = 0.0423 L X 0.107 mol/L = 4.526X10^-3 mol NaOH

    From the stoichiometry of the reaction, moles NaOH = moles HClO4

    Molarity HClO4 = 4.526X10^-3 mol / 0.025 L = 0.181 M

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