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anonymous

  • one year ago

The Kw of water varies with temperature. Calculate the pH of water at 46⁰C with a Kw = 1.219 x 10-14. Show all calculations leading to an answer.

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  1. anonymous
    • one year ago
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    You meant this right? \[10^{-14}\]

  2. anonymous
    • one year ago
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    yes

  3. anonymous
    • one year ago
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    Okay. One moment

  4. anonymous
    • one year ago
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    Have you at least started the process?

  5. anonymous
    • one year ago
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    kind of lost

  6. anonymous
    • one year ago
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    I will try my best to help you understand

  7. anonymous
    • one year ago
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    \[[H+][OH-]= Kw\] Does that look familiar?

  8. anonymous
    • one year ago
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    no not really

  9. anonymous
    • one year ago
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    @Shalante could you help with this?

  10. JoannaBlackwelder
    • one year ago
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    Yes, @KimberNicoleee, that is the correct formula.

  11. anonymous
    • one year ago
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    I wasn't completely sure. Thank you(:

  12. JoannaBlackwelder
    • one year ago
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    Keep in mind that the dissociation of water makes equal moles of hydronium and hydroxide.

  13. JoannaBlackwelder
    • one year ago
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    No problem :-) Any thoughts from here, @Dajala ?

  14. anonymous
    • one year ago
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    STILL KINDA LOST CAN YOU LIKE SHOW ME STEP BY STEP

  15. JoannaBlackwelder
    • one year ago
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    |dw:1441062561336:dw|

  16. JoannaBlackwelder
    • one year ago
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    So, at equilibrium, the concentrations of hydroxide and hydronium are equal.

  17. JoannaBlackwelder
    • one year ago
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    We can sub in x for both concentrations and solve for x.

  18. JoannaBlackwelder
    • one year ago
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    |dw:1441062951399:dw|

  19. JoannaBlackwelder
    • one year ago
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    Does that make sense so far?

  20. anonymous
    • one year ago
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    Yes thank you so much

  21. JoannaBlackwelder
    • one year ago
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    You're welcome :-)

  22. JoannaBlackwelder
    • one year ago
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    Can you find the concentration of hydronium from here?

  23. anonymous
    • one year ago
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    5.4o kJ to use (G)(2260)=5.40 *1000=5400 2.40 g right

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