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Heinie du Rand
Heinie du Rand asked in Science & MathematicsChemistry · 9 years ago

Stoichiometry HELP! Silver nitrate is added to a 25 cm3 sample of hydrochloric acid.?

Silver nitrate is added to a 25 cm3 sample of hydrochloric acid. A white precipitate of silver chloride is then filtered off. If the dry precipitate weighs 0.3537 g, determine the pH of the hydrochloric acid solution.

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  • Trevor H
    Lv 7
    9 years ago
    Favorite Answer

    Molar mass AgCl = 143.3 g/mol

    0.3537f AgCl = 0.3537 / 143.3 = 0.002468 mol AgCl

    0.002468 mol AgCl will contain 0.002468 mol Cl- ions

    Therefore you reacted 0.002468 mol HCl

    25mL HCl solution contained 0.002468 mol HCl

    1000mL HCl solution contained 1000/25*0.002468 = 0.0987 mol HCl in 1.0L solution

    This is 0.10 mol /litre

    [H+] = 0.1M

    pH = -log 0.1

    pH = 1.0

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