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16 July, 06:29

A 55.0-mg sample of al (oh) 3 is reacted with 0.200m hcl. how many milliters of the acid are needed to neutralize the al (oh) 3?

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  1. 16 July, 08:42
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    Al (OH) ₃ + 3HCl = AlCl₃ + 3H₂O

    C=0.200 mmol/mL

    M{Al (OH) ₃}=78.0 mg/mmol

    m{Al (OH) ₃}=55.0 mg

    n{Al (OH) ₃}=m{Al (OH) ₃}/M{Al (OH) ₃}

    3n{Al (OH) ₃}=n (HCl) = CV

    3m{Al (OH) ₃}/M{Al (OH) ₃}=CV

    V=3m{Al (OH) ₃}/[CM{Al (OH) ₃}]

    V=3*55.0/[0.200*78.0]=10.6 mL
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