Question #f31fc

1 Answer
Jarni Renz
Dec 22, 2017

#=(56.0g)/(mol)#

Explanation:

  1. Write and balance the equation.
    #Fe+2HCl->FeCl_2+H_2#
  2. Given the mass and concentration of #HCl#, we can find the #etaHCl# through this formula.
    #"Molarity"=eta/"Li solution"#
    #eta="Molarity"xx"Li solution"#
    #eta=((2.2mol)/cancel((L)))((50.0cancel(mL))xx(1cancel(L))/(1000cancel(mL)))#
    #eta=0.1100molHCl#
  3. Now, find #etaFe# through molar conversion with reference to the balanced equation for molar ratio.
    #=0.1100cancel(molHCl)xx(1molFe)/(2cancel(molHCl))#
    #=0.055molFe#
  4. Lastly, find the relative atomic mass of #Fe#
    #M_(Fe)=(mFe)/(etaFe)#
    #M_(Fe)=(3.08g)/(0.055mol)#
    #M_(Fe)=(56.0g)/(mol)#
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