Problem: Hydrobromic acid dissolves solid iron according to the following reaction:Fe(s) + 2HBr(aq) → FeBr2(aq) + H2(g)What mass of HBr (in g) would you need to dissolve a 3.2 -g pure iron bar on a padlock?

FREE Expert Solution

Use molar mass to convert to moles: 

Molar mass Fe = 55.85 g/mol

Molar mass HBr = 80.91 g/mol


Fe(s) + 2 HBr(aq) → FeBr2(aq) + H2(g)

1 mole Fe → 2 moles HBr


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Problem Details

Hydrobromic acid dissolves solid iron according to the following reaction:
Fe(s) + 2HBr(aq) → FeBr2(aq) + H2(g)

What mass of HBr (in g) would you need to dissolve a 3.2 -g pure iron bar on a padlock?

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