Balance the following the chemical equation:
_ Na2O + _ CaBr2 → _ NaBr + _ CaO
a
1:2:1:1
b
1:1:2:1
c
2:1:1:1
d
1:1:1:2
The balanced chemical equation is:
2 Na2O + CaBr2 → 4 NaBr + CaO
So the correct answer is c) 2:1:1:1.
To balance the chemical equation:
Na2O + CaBr2 → 2NaBr + CaO
The balanced equation is option c: 2:1:1:1
To balance a chemical equation, you need to make sure that the same number of each type of atom is present on both sides of the equation. Let's go through the process step by step:
First, let's count the number of atoms for each element on both sides of the equation:
On the left side:
- Sodium (Na): 2 Na
- Oxygen (O): 1 O
- Calcium (Ca): 0 Ca
- Bromine (Br): 2 Br
On the right side:
- Sodium (Na): 1 Na
- Oxygen (O): 1 O
- Calcium (Ca): 1 Ca
- Bromine (Br): 1 Br
Since the number of atoms is not balanced, we need to adjust the coefficients (numbers in front of each compound or element) to balance the equation.
To balance the sodium (Na) atoms, you can put a coefficient of 2 in front of NaBr on the right side:
_ Na2O + _ CaBr2 → 2 NaBr + _ CaO
Now, let's check the other atoms.
Oxygen (O) atoms are already balanced.
Calcium (Ca) atoms are not balanced. We need to put a coefficient of 1 in front of CaO on the right side:
_ Na2O + _ CaBr2 → 2 NaBr + CaO
Finally, we check the bromine (Br) atoms. We have 4 bromine atoms on the right side, but only 2 on the left side. To balance them, put a coefficient of 2 in front of NaBr on the left side:
_ Na2O + _ CaBr2 → 2 NaBr + CaO
Now the equation is balanced:
1 Na2O + 1 CaBr2 → 2 NaBr + 1 CaO
So the balanced chemical equation is option b) 1:1:2:1