Grade 12Physical Chemistry
What percentage of Fe+3 is present in Fe0.93O???????????
1 Answer
Chhavi Jain
Dear Student,
We know that the compound contains the mixture of Fe2+ and Fe+3 ions , but we don’t know how much each of them is present .
The trick we will use to solve this question is charge balancing .
Let us say that we have 100 moles of the compound .
So, there will be 93 ions of Fe2+ and Fe3+ and 100 ions of O2- ,
Since the compound is neutral so, the (-2) charge of the oxygen must be balanced with the overall charge of iron ions.
Let us say that we have x ions of iron (II) and y ions of iron(III) . Now ,
x+y = 93 ….............eq.(i)
also,
total positive charge = total negative charge
x (+2) + y (+3) = 100 (-2) ….............. eq.(ii)
solving eq.(i) and eq.(ii) we get ;
x= 79 and y=14
so, we hav 14 Fe3+ ions and total ions in the compound is 193. So, the percent composition of Fe3+ ions in the compound is = ( 14 Fe3+ ions / 193 total ions ) * 100
=7.25%
Other Related Questions on physical chemistry
Which of the following aqueous solutions remains neutral after
electrolysis
Which of the following aqueous solutions remains neutral after
electrolysis
electrolysis
physical chemistry
Last Activity: 3 Years ago
In the reaction A + 2B ⇌ 2C, if 2 moles of A, 3 moles of B and 2 moles of C are placed in a 2 L flask and
the equilibrium concentration of C is 0.5 mol/L. The equilibrium constant (KC) for the reaction is.....and please tell how you know that the reaction is going forward .. imean how to calculate the reaction quotient ???
In the reaction A + 2B ⇌ 2C, if 2 moles of A, 3 moles of B and 2 moles of C are placed in a 2 L flask and
the equilibrium concentration of C is 0.5 mol/L. The equilibrium constant (KC) for the reaction is.....and please tell how you know that the reaction is going forward .. imean how to calculate the reaction quotient ???
the equilibrium concentration of C is 0.5 mol/L. The equilibrium constant (KC) for the reaction is.....and please tell how you know that the reaction is going forward .. imean how to calculate the reaction quotient ???
physical chemistry
Last Activity: 3 Years ago
True or false when an electron in ground state of hydrogen atom is excited with an energy that is greayer than e2-e1 but less than e3-e1 the electron will get excited n=2
True or false when an electron in ground state of hydrogen atom is excited with an energy that is greayer than e2-e1 but less than e3-e1 the electron will get excited n=2
physical chemistry
Last Activity: 3 Years ago
18 19 gram mixture of na2co3 and nahco3 on heating gives 2.2 gram CO2 gas find the percent nahco3 (by mass) in mixture
18 19 gram mixture of na2co3 and nahco3 on heating gives 2.2 gram CO2 gas find the percent nahco3 (by mass) in mixture
physical chemistry
Last Activity: 4 Years ago