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anonymous

  • one year ago

The H3O concentration of HCL is 2 x 10 ^-10 M, what is the pH? 10.5 9.7 4.5

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  1. aaronq
    • one year ago
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    If HCl is a strong acid - meaning it dissociates 100% - then use \(\sf pH=-log[H_3O^+]\)

  2. Photon336
    • one year ago
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    The pH is equivalent to the -log of the H+ concentration. pH = -log[H+] The P in-front of the H means take the -log of something. -log[2x10^-10] Remember pH is a relative term, just says the concentration of H+ ions in a solution, but doesn't give you the sense how strong an acid is, for that we use Ka values.

  3. rvc
    • one year ago
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    i agree with both.

  4. anonymous
    • one year ago
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    I put it in the calculator and got 9.6989 so I'm assuming that's the answer, thanks guys :)

  5. Photon336
    • one year ago
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    Yes 9.69 is the answer! And remember the product of [H+][OH-] = 10^-14

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