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julez
julez asked in Science & MathematicsChemistry · 4 years ago

ONLY 3 CHEM QUESTIONS!!! find the ph levels to the solutions below! BEST ANSWER AWARDED IF WORK SHOWN?

1 . 0.050 M Ca(OH)2

2. 0.030 M HBr

3. 0.150 M KOH

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  • Simonizer1218
    Lv 7
    4 years ago
    Favorite Answer

    1. Ca(OH)2 ==> Ca^2+ + 2OH^-. [OH-] = 2x0.050 M = 0.10 M OH-; pOH = -log 0.1 = 1 and pH = 14 - pOH = 13 = pH

    2. HBr ==> H+ + Br-. [H+] = 0.030 M; pH = -log 0.03 = 1.5 = pH

    3. KOH ==> K+ + OH-. [OH-] = 0.150 M; pOH = -log 0.150 = 0.824; pH = 14 - 0.824 = 13.2 = pH

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