Fe + Fe2(SO4)3 → 3FeSO4
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Word Equation
Iron + Ferric Sulfate = Iron(Ii) Sulfate
One mole of solid
and one mole of aqueous
combine vĩ đại size three moles of aqueous
Reaction Type
Synthesis
- Redox
Net Ionic Equation
Fe(s) + Fe2(SO4)3(aq) = 3FeSO4(aq) might be an ionic reaction. Calculate the net ionic equation for Fe(s) + Fe2(SO4)3(aq) = 3FeSO4(aq).
Redox (Oxidation-Reduction) Reaction
Fe + Fe2(SO4)3 = FeSO4 might be a redox reaction.
Reactants
Iron - Fe
Ferric Sulfate - Fe2(SO4)3
Ferric Sulfate Anhydrous Iron(Iii) Sulfate(Vi) Diiron Trisulfate Ferric Persulfate Ferric Sesquisulfate Ferric Tersulfate Iron Persulfate Iron Sesquisulfate Fe2(SO4)3 Molar Mass Fe2(SO4)3 Oxidation Number
Products
Iron(Ii) Sulfate - FeSO4
Ferrous Sulphate Iron(Ii) Sulphate (1:1) Iron(Ii) Sulphate Iron Sulphate (1:1) Ferrous Sulfate Anhydrous Fe(Ii)So4 Feso4 Iron(2+) Sulfate (Anh.) FeSO4 Molar Mass FeSO4 Oxidation Number
Thermodynamics
Thermodynamics of the reaction can be calculated using a lookup table.
Is the Reaction Exothermic or Endothermic?
| Fe (s alpha) | 1 mol | 0 kJ/mol | -0 kJ |
|---|---|---|---|
| Fe2(SO4)3 (s) | 1 mol | -2581.528 kJ/mol | 2581.528 kJ |
| FeSO4 (s) | 3 mol | -928.4296 kJ/mol | -2785.2888 kJ |
| ΣΔH°f(reactants) | -2581.528 kJ | ||
| ΣΔH°f(products) | -2785.2888 kJ | ||
| ΔH°rxn | -203.7608 kJ | ||
ΣΔH°f(reactants) > ΣΔH°f(products), so sánh Fe + Fe2(SO4)3 = FeSO4 is exothermic (releases heat).
Is the Reaction Exoentropic or Endoentropic?
ΔS = Sproducts - Sreactants. If ΔS < 0, it is exoentropic. If ΔS > 0, it is endoentropic.
| Fe (s alpha) | 1 mol | 27.27968 J/(mol K) | -27.27968 J/K |
|---|---|---|---|
| Fe2(SO4)3 (s) | 1 mol | 307.524 J/(mol K) | -307.524 J/K |
| FeSO4 (s) | 3 mol | 120.9176 J/(mol K) | 362.7528 J/K |
| ΣΔS°(reactants) | 334.80368 J/K | ||
| ΣΔS°(products) | 362.7528 J/K | ||
| ΔS°rxn | 27.94912 J/K | ||
ΣΔS°(products) > ΣΔS°(reactants), so sánh Fe + Fe2(SO4)3 = FeSO4 is endoentropic (increase in entropy).
Is the Reaction Exergonic or Endergonic?
ΔG = Gproducts - Greactants. If ΔG < 0, it is exergonic. If ΔG > 0, it is endergonic.
| Fe (s alpha) | 1 mol | 0 kJ/mol | -0 kJ |
|---|---|---|---|
| Fe2(SO4)3 (s) | 1 mol | -2263.1256 kJ/mol | 2263.1256 kJ |
| FeSO4 (s) | 3 mol | -825.0848 kJ/mol | -2475.2544 kJ |
| ΣΔG°(reactants) | -2263.1256 kJ | ||
| ΣΔG°(products) | -2475.2544 kJ | ||
| ΔG°rxn | -212.1288 kJ | ||
ΣΔG°(reactants) > ΣΔG°(products), so sánh Fe + Fe2(SO4)3 = FeSO4 is exergonic (releases energy).
Reaction Expressions
Kc or Q = ( [FeSO4]3 ) / ( [Fe] [Fe2(SO4)3] )
(assuming all reactants and products are aqueous. substitutue 1 for any solids/liquids, and Psubstance for gases.)
rate = -(Δ[Fe] / Δt) = -(Δ[Fe2(SO4)3] / Δt) = 1/3 * (Δ[FeSO4] / Δt)
(assuming constant volume in a closed system and no accumulation of intermediates or side products)
Instructions
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To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. The balanced equation will appear above.
- Use uppercase for the first character in the element and lowercase for the second character. Examples: Fe, Au, Co, Br, C, O, N, F.
- Ionic charges are not yet supported and will be ignored.
- Replace immutable groups in compounds vĩ đại avoid ambiguity. For example, C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but XC2H5 + O2 = XOH + CO2 + H2O will.
- Compound states [like (s) (aq) or (g)] are not required.
- You can use parenthesis () or brackets [].
How To Balance Equations
Read our article on how vĩ đại balance chemical equations or ask for help in our chat.
You can also ask for help in our chat or forums.
Balance Fe + Fe2(SO4)3 = FeSO4 Using the Algebraic Method
To balance the equation Fe + Fe2(SO4)3 = FeSO4 using the algebraic method step-by-step, you must have experience solving systems of linear equations. The most common methods are substitution/elimination and linear algebra, but any similar method will work.
Label Each Compound With a Variable
Label each compound (reactant or product) in the equation with a variable vĩ đại represent the unknown coefficients.
a Fe + b Fe2(SO4)3 = c FeSO4
Create a System of Equations
Create an equation for each element (Fe, S, O) where each term represents the number of atoms of the element in each reactant or product.
Fe: 1a + 2b = 1c S: 0a + 3b = 1c O: 0a + 12b = 4c
Solve For All Variables
Use substitution, Gaussian elimination, or a calculator vĩ đại solve for each variable.
- 1a + 2b - 1c = 0
- 3b - 1c = 0
- 12b - 4c = 0
Use your graphing calculator's rref() function (or an online rref calculator) vĩ đại convert the following matrix into reduced row-echelon-form:
[ 1 2 -1 0] [ 0 3 -1 0] [ 0 12 -4 0]
The resulting matrix can be used vĩ đại determine the coefficients. In the case of a single solution, the last column of the matrix will contain the coefficients.
Simplify the result vĩ đại get the lowest, whole integer values.
- a = 1 (Fe)
- b = 1 (Fe2(SO4)3)
- c = 3 (FeSO4)
Substitute Coefficients and Verify Result
Count the number of atoms of each element on each side of the equation and verify that all elements and electrons (if there are charges/ions) are balanced.
Fe + Fe2(SO4)3 = 3 FeSO4
Reactants Products Fe 3 3 ✔️ S 3 3 ✔️ O 12 12 ✔️ Since there is an equal number of each element in the reactants and products of Fe + Fe2(SO4)3 = 3FeSO4, the equation is balanced.
Balance Fe + Fe2(SO4)3 = FeSO4 Using Inspection
The law of conservation of mass states that matter cannot be created or destroyed, which means there must be the same number atoms at the over of a chemical reaction as at the beginning. To be balanced, every element in Fe + Fe2(SO4)3 = FeSO4 must have the same number of atoms on each side of the equation. When using the inspection method (also known as the trial-and-error method), this principle is used vĩ đại balance one element at a time until both sides are equal and the chemical equation is balanced.
1. Count the number of each element on the left and right hand sides
| Reactants (Left Hand Side) | Products (Right Hand Side) | |||||
|---|---|---|---|---|---|---|
| Reactants | Products | |||||
| Fe | Fe2(SO4)3 | Total | FeSO4 | Total | ||
| Fe | 1 | 2 | 3 | 1 | 1 | ❌ |
| S | 3 | 3 | 1 | 1 | ❌ | |
| O | 12 | 12 | 4 | 4 | ❌ | |
2. Multiply coefficients for compounds vĩ đại balance out each element
For each element that is not equal, try vĩ đại balance it by adding more of it vĩ đại the side with less. Sometimes there may be multiple compounds with that element on one side, so sánh you'll need vĩ đại use your best judgement and be prepared vĩ đại go back and try the other options.
Fe is not balanced. Add 2 molecules of FeSO4 vĩ đại the product (right-hand) side vĩ đại balance Iron:
Fe + Fe2(SO4)3 = 3FeSO4Reactants Products Fe 3 3 ✔️ S 3 3 ✔️ O 12 12 ✔️
3. Verify that the equation is balanced
Since there are an equal number of atoms of each element on both sides, the equation is balanced.
Fe + Fe2(SO4)3 = 3FeSO4
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