Balance the following the chemical equation:
_ Na2O + _ CaBr2 → _ NaBr + _ CaO
a
1:1:1:2
b
2:1:1:1
c
1:1:2:1
d
1:2:1:1
The balanced chemical equation for the reaction is:
2 Na2O + CaBr2 → 4 NaBr + CaO
So, the correct answer is:
b) 2:1:1:1
To balance the equation: Na2O + CaBr2 → NaBr + CaO
We need to ensure that the number of atoms of each element is the same on both sides of the equation.
Let's start by balancing the sodium (Na) atoms.
On the left side, there are 2 sodium (Na) atoms in Na2O, and on the right side, there is only 1 sodium (Na) atom in NaBr. To balance these, we need to put a coefficient of 2 in front of NaBr on the right side.
2 Na2O + CaBr2 → NaBr + CaO
Next, let's balance the calcium (Ca) atoms.
On the left side, there is 1 calcium (Ca) atom in CaBr2, and on the right side, there is 1 calcium (Ca) atom in CaO. So, in this case, the calcium (Ca) atoms are already balanced.
2 Na2O + CaBr2 → NaBr + CaO
Now, let's balance the oxygen (O) atoms.
On the left side, there are 4 oxygen (O) atoms in Na2O, and on the right side, there are 1 oxygen (O) atom in CaO. To balance these, we need to put a coefficient of 2 in front of CaO on the right side.
2 Na2O + CaBr2 → NaBr + 2 CaO
Finally, let's balance the bromine (Br) atoms.
On the left side, there is 2 bromine (Br) atoms in CaBr2, and on the right side, there is 2 bromine (Br) atoms in NaBr. So, in this case, the bromine (Br) atoms are already balanced.
Therefore, the balanced chemical equation is:
2 Na2O + CaBr2 → 2 NaBr + 2 CaO
The correct answer is option d: 1:2:1:1.
To balance a chemical equation, we need to ensure that there is an equal number of atoms on both sides of the equation.
For the given equation:
_Na2O + _CaBr2 → _NaBr + _CaO
First, let's count the number of atoms on each side:
On the left side (reactants):
- Sodium (Na): 2 atoms
- Oxygen (O): 1 atom
- Calcium (Ca): 0 atoms
- Bromine (Br): 2 atoms
On the right side (products):
- Sodium (Na): 1 atom
- Oxygen (O): 1 atom
- Calcium (Ca): 1 atom
- Bromine (Br): 2 atoms
Now, we can try to balance the equation by choosing appropriate coefficients for each compound.
Option a: 1:1:1:2
Na2O + CaBr2 → NaBr + 2CaO
This option balances the number of atoms of Bromine (Br), but the number of sodium (Na) and calcium (Ca) atoms are not balanced. Therefore, it is not the correct answer.
Option b: 2:1:1:1
2Na2O + CaBr2 → 2NaBr + CaO
This option balances the number of sodium (Na) atoms but does not balance the number of calcium (Ca) and bromine (Br) atoms. Therefore, it is not the correct answer.
Option c: 1:1:2:1
Na2O + CaBr2 → NaBr2 + CaO
This option balances the number of sodium (Na) and oxygen (O) atoms, but the number of bromine (Br) and calcium (Ca) atoms are not balanced. Therefore, it is not the correct answer.
Option d: 1:2:1:1
Na2O + 2CaBr2 → 2NaBr + CaO
This option balances the equation by ensuring there is an equal number of atoms for each element on both sides of the equation. Therefore, the correct answer is option d.
The balanced chemical equation is:
Na2O + 2CaBr2 → 2NaBr + CaO