2NaHCO3 → Na2CO3 + CO2 Which of the following can be added to the products to balance the equation? (1 point) Responses CH2OH CH 2 OH O2 O 2 H2O H 2 O H2
H 2 O
To balance the equation, you need to make sure that the number of each type of atom is the same on both sides of the equation. Let's analyze each option:
CH2OH - This is a compound that contains carbon, hydrogen, and oxygen atoms. Since there are no carbon and hydrogen atoms in the reactants or products, adding this compound will not help balance the equation.
CH 2 OH - This is also a compound with carbon, hydrogen, and oxygen atoms. Similar to the first option, adding this compound will not balance the equation as there are no carbon and hydrogen atoms to be balanced.
O2 - This represents oxygen gas, O2. Since the reaction already includes all the oxygen in the form of carbon dioxide (CO2) and sodium bicarbonate (NaHCO3), adding more oxygen would not balance the equation.
O 2 - This notation represents oxygen gas. As mentioned above, there is already enough oxygen in the reaction, so adding more oxygen would not balance the equation.
H2O - This represents water molecules. To balance the equation, you need to have the same number of oxygen atoms on both sides. Since there is one oxygen atom in NaHCO3 and none in Na2CO3, adding a water molecule (H2O) to the products (right side) would balance the equation.
H 2 O - This notation also represents water molecules. Adding water molecules to the products would help balance the equation by ensuring that the number of oxygen atoms is the same on both sides.
H2 - This represents hydrogen gas. Since there are no hydrogen atoms in the reactants or products, adding hydrogen gas would not help balance the equation.
Therefore, the correct response is H2O (option H 2 O).
To balance the given chemical equation:
2NaHCO3 → Na2CO3 + CO2
We need to ensure that the same number of atoms of each element appears on both sides of the equation. Let's go through each element one by one:
1. Sodium (Na): There are two sodium atoms on the left side and two sodium atoms on the right side, so sodium is already balanced.
2. Hydrogen (H): There are two hydrogen atoms on the left side and no hydrogen atoms on the right side. To balance hydrogen, we can add water (H2O) to the products side:
2NaHCO3 → Na2CO3 + CO2 + H2O
3. Carbon (C): There is one carbon atom on the left side and one carbon atom on the right side, so carbon is already balanced.
4. Oxygen (O): There are six oxygen atoms on the left side (two from the HCO3- group) and four oxygen atoms on the right side (one from the CO3^2- group and three from CO2). To balance oxygen, we need to add four oxygen atoms. This can be achieved by adding carbon dioxide (CO2) to the products side:
2NaHCO3 → Na2CO3 + CO2 + H2O
Therefore, the correct answer is CO2, which needs to be added to the product side to balance the equation.