Balance the following the chemical equation:
_ Na2O + _ CaBr2 → _ NaBr + _ CaO
a
1:2:1:1
b
1:1:2:1
c
1:1:1:2
d
2:1:1:1
The balanced chemical equation is:
1 Na2O + 1 CaBr2 → 2 NaBr + 1 CaO
So, the correct answer is option c) 1:1:1:2.
To balance a chemical equation, we need to make sure that the number of atoms on both sides of the equation is equal. Let's go through the process step by step.
The unbalanced equation is:
_ Na2O + _ CaBr2 → _ NaBr + _ CaO
Let's start by counting the number of atoms on each side:
On the left-hand side:
2 sodium (Na) atoms in Na2O
1 oxygen (O) atom in Na2O
2 calcium (Ca) atoms in CaBr2
2 bromine (Br) atoms in CaBr2
On the right-hand side:
1 sodium (Na) atom in NaBr
1 bromine (Br) atom in NaBr
1 calcium (Ca) atom in CaO
1 oxygen (O) atom in CaO
Now, let's balance the equation using the answer choices provided:
a) 1:2:1:1
Using this answer choice, we have 2 sodium (Na) atoms on the left side and only 1 sodium (Na) atom on the right side. Therefore, this choice is incorrect.
b) 1:1:2:1
Using this answer choice, we have 2 bromine (Br) atoms on the left side and only 1 bromine (Br) atom on the right side. Therefore, this choice is incorrect.
c) 1:1:1:2
Using this answer choice, we have 1 oxygen (O) atom on the left side and 2 oxygen (O) atoms on the right side. Therefore, this choice is incorrect.
d) 2:1:1:1
Using this answer choice, we have 2 sodium (Na) atoms on the left side and 2 sodium (Na) atoms on the right side. We also have 2 bromine (Br) atoms on the left side and 2 bromine (Br) atoms on the right side. Moreover, we have 2 calcium (Ca) atoms on the left side and 2 calcium (Ca) atoms on the right side. Finally, we have 1 oxygen (O) atom on the left side and 1 oxygen (O) atom on the right side.
Therefore, the balanced equation is:
2 Na2O + CaBr2 → 2 NaBr + CaO
So, the correct answer is d) 2:1:1:1
To balance the chemical equation:
Na2O + CaBr2 → NaBr + CaO
We need to ensure that there is an equal number of atoms of each element on both sides of the equation.
Looking at the equation, we see that we have 2 Na atoms on the left side and only 1 Na atom on the right side. To balance the Na atoms, we need to put a coefficient of 2 in front of NaBr:
Na2O + CaBr2 → 2 NaBr + CaO
Next, we have 1 Ca atom on the left side and 1 Ca atom on the right side, so the Ca atoms are already balanced.
Moving on to the O atoms, we have 1 O atom on the left side and 1 O atom on the right side. So, the O atoms are also balanced.
Finally, we have 2 Br atoms on the right side and no Br atoms on the left side. To balance the Br atoms, we need to put a coefficient of 2 in front of CaBr2:
Na2O + 2 CaBr2 → 2 NaBr + CaO
Therefore, the balanced chemical equation is:
Na2O + 2 CaBr2 → 2 NaBr + CaO
The correct answer is (d) 2:1:1:1.