Write balanced chemical equations (using symbols) for the following reactions 1.hydrochloric acid reacts with magnesium to form magnesium chloride and hydrogen 2.Nitrogen monoxide burns in oxygen to form nitrogen dioxide
To write balanced chemical equations, you need to follow the law of conservation of mass, which states that atoms are neither created nor destroyed in a chemical reaction. Here are the balanced chemical equations for the given reactions:
1. Hydrochloric acid reacts with magnesium to form magnesium chloride and hydrogen:
The chemical equation is: HCl + Mg → MgCl2 + H2
Explanation:
To balance this equation, let's start with the number of atoms for each element on both sides of the equation.
On the left side, there is 1 atom of hydrogen (H) in HCl, and on the right side, there are 2 atoms of hydrogen in H2. Therefore, we need to multiply HCl by 2 to balance the hydrogens.
The balanced equation becomes: 2HCl + Mg → MgCl2 + H2
Next, let's balance the chlorine (Cl) atoms. On the left, there are 2 Cl atoms in 2HCl, while there are 2 Cl atoms on the right in MgCl2. Therefore, the chlorine is already balanced.
Finally, let's balance magnesium (Mg). On the left, there is 1 Mg atom, and on the right, there is also 1 Mg atom. Thus, the magnesium is already balanced.
Therefore, the balanced chemical equation is: 2HCl + Mg → MgCl2 + H2.
2. Nitrogen monoxide burns in oxygen to form nitrogen dioxide:
The chemical equation is: 2NO + O2 → 2NO2
Explanation:
To balance this equation, let's start with the number of atoms for each element on both sides of the equation.
On the left side, there are 2 nitrogen (N) atoms in 2NO, while on the right side, there are also 2 nitrogen atoms in 2NO2. Thus, the nitrogen atoms are balanced.
Next, let's balance the oxygen (O) atoms. On the left, there is 2 oxygen atoms in O2, while on the right side, there are 4 oxygen atoms in 2NO2. To balance the oxygen, we need to multiply O2 by 2.
The balanced equation becomes: 2NO + 2O2 → 2NO2
Therefore, the balanced chemical equation is: 2NO + 2O2 → 2NO2.