The equation that is balanced among the given options is the first equation NaOH + HCl → NaCl + H2O
From the question,
We are to determine which of the options gives a balanced equation for the reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl) to make table salt (NaCl) and water (H₂O)
To do this, we will check which of the given equations is balanced, by checking the equations one after the other.
First, we will define what is meant by balanced equation.
Balanced equations are those whose coefficients result in equal numbers of atoms for each element in the reactants and products
- For NaOH + HCl → NaCl + H2O
On the reactants side
Na = 1
O = 1
H = 2
Cl = 1
On the products side
Na = 1
O = 1
H = 2
Cl = 1
Since equal number of atoms of each element are present at both the reactants and products sides, then the equation is balanced
- For 2NaOH + 2HCl → 2NaCl + H2O
On the reactants side
Na = 2
O = 2
H = 4
Cl = 1
On the products side
Na = 2
O = 1
H = 2
Cl = 2
The number of atoms of each element present at the reactants side and that present at products side are not equal.
∴ The equation is not balanced
- For 2NaOH + HCl → NaCl + H2O
On the reactants side
Na = 2
O = 2
H = 3
Cl = 1
On the products side
Na = 1
O = 1
H = 2
Cl = 1
The number of atoms of each element present at the reactants side and that present at products side are not equal.
∴ The equation is not balanced
- For NaOH + 2HCl → NaCl + H2O
On the reactants side
Na = 1
O = 1
H = 2
Cl = 2
On the products side
Na = 1
O = 1
H = 2
Cl = 1
The number of atoms of each element present at the reactants side and that present at products side are not equal.
∴ The equation is not balanced
Hence, the equation that is balanced is the first equation NaOH + HCl → NaCl + H2O
Learn more here: brainly.com/question/17015942
;