Chemistry II

How long would it take to consume 13 mg of magnesium in 4.2 mL of 1.25 M HCl? Explain.

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  1. Mg+2HCl>>MgCl2+H2 neglecting the water in the acid.

    moles Mg: .013/26=.005moles
    Moles HCL=.0042*1.25=.00525moles

    Well, you need twice as many moles of HCL in the balanced equation than moles Mg, so the reaction will never complete, not enough HCl.

    Answer: how long will it take? Till Kingdom come.

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