A piece of iron with a total surface area of 225 in2 is covered with a solid 0.105 mm coating of Fe2O3, commonly known as rust. The reaction of 1 mol of Fe2O3 with 6 mol of HCl(aq) produces 2 mol of FeCl3(aq) and 3 mol of H2O(l). Once rust reacts to form FeCl3(aq) it is essentially removed from the surface of the metal. Rust (Fe2O3) has a density of 5.2 g/cm3 and the HCl(aq) solution used has a density of 1.07 g/mL and contains 17% HCl by mass (i.e., mass HCl per mass of solution expressed as a percent). How many mL of the aqueous HCl solution do you need to clean off all the rust from the piece of iron?
A piece of iron with a total surface area of 225 in2 is covered with a solid 0.105 mm coating of Fe2O3,
commonly known as rust. The reaction of 1 mol of Fe2O3 with 6 mol of HCl(aq) produces 2 mol of FeCl3(aq)
and 3 mol of H2O(l). Once rust reacts to form FeCl3(aq) it is essentially removed from the surface of the metal.
Rust (Fe2O3) has a density of 5.2 g/cm3 and the HCl(aq) solution used has a density of 1.07 g/mL and contains
17% HCl by mass (i.e., mass HCl per mass of solution expressed as a percent). How many mL of the
aqueous HCl solution do you need to clean off all the rust from the piece of iron?
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How did you get that: The solution of HCl is given to have 17 g of HCl present in 100 g of the solution. Hence the 1 g of HCl will be present in 10017 g of the solution.- Where does the 10017 g come from?
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