Are these equations balanced or unbalanced
6. 2AlN Yields 2Al+N2
Balanced
7.Mg(OH)2+2HCl Yields MgCl2+2H2O
Balanced
8. K+H2O Yields H2+KOH
Unbalanced
right
To determine whether these equations are balanced or unbalanced, we need to count the number of atoms of each element on both sides of the equation.
Let's analyze each equation:
6. 2AlN --> 2Al + N2
On the left side, we have 2 aluminum (Al) atoms and 2 nitrogen (N) atoms. On the right side, we also have 2 aluminum atoms and 2 nitrogen atoms. Therefore, the equation is balanced.
7. Mg(OH)2 + 2HCl --> MgCl2 + 2H2O
On the left side, we have 1 magnesium (Mg) atom, 2 oxygen (O) atoms, and 2 hydrogen (H) atoms. On the right side, we have 1 magnesium atom, 2 chlorine (Cl) atoms, and 4 hydrogen atoms. To balance the number of oxygen atoms, we need to put a coefficient of 2 in front of the water (H2O) on the right side. So the balanced equation is:
Mg(OH)2 + 2HCl --> MgCl2 + 2H2O
8. K + H2O --> H2 + KOH
On the left side, we have 1 potassium (K) atom. On the right side, we have 2 hydrogen atoms and 1 oxygen atom from water (H2O), as well as 1 hydrogen atom and 1 potassium atom from potassium hydroxide (KOH). The number of hydrogen atoms does not match on both sides, so the equation is unbalanced.
To balance equation 8, we can add a coefficient of 2 in front of KOH to balance the number of hydrogen atoms. The balanced equation is:
2K + 2H2O --> H2 + 2KOH