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anonymous

  • one year ago

2.00 g of NaOH are dissolved in water to make 4.00 L of solution. What is the concentration of hydronium ions, [H3O+], in this solution? How can I work this problem? The book was no help.

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  1. JoannaBlackwelder
    • one year ago
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    Use the idea that NaOH completely dissociates to find the moles of hydroxide ions.

  2. JoannaBlackwelder
    • one year ago
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    Divide that by the total volume to find molarity.

  3. JoannaBlackwelder
    • one year ago
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    Find pOH using pOH=-log[OH-}

  4. JoannaBlackwelder
    • one year ago
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    Find pH using pH+pOH=14

  5. JoannaBlackwelder
    • one year ago
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    Find concentration of hydronium using pH=-log[H3O+]

  6. anonymous
    • one year ago
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    So 2.00g of NAOH is equal to how many mol of NaOH? Use the molar mass? I hate stoichiometry.

  7. JoannaBlackwelder
    • one year ago
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    Yep, molar mass and balanced dissociation reaction.

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