C2H5OH + HCl → C2H5Cl + H2O
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Ethanol + Hydrogen Chloride = Chloroethane + Water
One mole of
and one mole of
react vĩ đại form one mole of
and one mole of
Kc or Q = ( [C2H5Cl] [H2O] ) / ( [C2H5OH] [HCl] )
(assuming all reactants and products are aqueous. substitutue 1 for any solids/liquids, and Psubstance for gases.)
rate = -(Δ[C2H5OH] / Δt) = -(Δ[HCl] / Δt) = (Δ[C2H5Cl] / Δt) = (Δ[H2O] / Δt)
(assuming constant volume in a closed system and no accumulation of intermediates or side products)
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 .
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Balance C2H5OH + HCl = C2H5Cl + H2O Using the Algebraic Method
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To balance the equation C2H5OH + HCl = C2H5Cl + H2O 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 C2H5OH + b HCl = c C2H5Cl + d H2O
Create a System of Equations
Create an equation for each element (C, H, O, Cl) where each term represents the number of atoms of the element in each reactant or product.
C: 2a + 0b = 2c + 0d H: 6a + 1b = 5c + 2d O: 1a + 0b = 0c + 1d Cl: 0a + 1b = 1c + 0d
Solve For All Variables
Use substitution, Gaussian elimination, or a calculator vĩ đại solve for each variable.
- 2a - 2c = 0
- 6a + 1b - 5c - 2d = 0
- 1a - 1d = 0
- 1b - 1c = 0
Use your graphing calculator's rref() function (or an online rref calculator) vĩ đại convert the following matrix into reduced row-echelon-form:
[ 2 0 -2 0 0] [ 6 1 -5 -2 0] [ 1 0 0 -1 0] [ 0 1 -1 0 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 (C2H5OH)
- b = 1 (HCl)
- c = 1 (C2H5Cl)
- d = 1 (H2O)
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.
C2H5OH + HCl = C2H5Cl + H2O
Reactants Products C 2 2 ✔️ H 7 7 ✔️ O 1 1 ✔️ Cl 1 1 ✔️
Since there is an equal number of each element in the reactants and products of C2H5OH + HCl = C2H5Cl + H2O, the equation is balanced.
Balance C2H5OH + HCl = C2H5Cl + H2O 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 C2H5OH + HCl = C2H5Cl + H2O 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)|
The number of atoms of each element on both sides of C2H5OH + HCl = C2H5Cl + H2O is equal which means that the equation is already balanced and no additional work is needed.
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