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When hydrochloric acid reacts with magnesium metal, hydrogen gas and aqueous magnesium chloride are produced. What volume of 1.0 M HCl is required to react completely with 4.00 g of magnesium


i did 4.00g x (mol/24.31 g Mg) x (2 mol HCl/1 mol Mg) x (L/!.0 mol HCl) = .329 L

why is this wrong?

  • chem -

    It looks ok to me, too. Perhaps the answer should be in mL and not L. Check the problem and your typing. Make sure all of the numbers and units agree.

  • chem -

    I don't see an error.

  • chem -

    I just noticed that the molarity of the HCl is 1.0 M; therrefore, you have only two significant figures. Thus the answer should be reported as 0.329 = 0.33 L tp 2 s.f. That may be the problem.

  • chem -

    thanks that worked

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