Which chemical equation is unbalanced?
[tex]$C + O _2 \rightarrow CO _2$[/tex]
[tex]$Sr + O _2 \rightarrow 2 SrO$[/tex]
[tex]$6 H _2+3 O _2 \rightarrow 6 H _2 O$[/tex]
[tex]$H _2+ H _2+ O _2 \rightarrow H _2 O + H _2 O$[/tex]
Answer (2)
Analyze each chemical equation to check if the number of atoms for each element is the same on both sides.
In the equation S r + O 2 → 2 S r O , there is 1 Sr atom on the left and 2 Sr atoms on the right, making it unbalanced.
The other equations are balanced, having the same number of atoms for each element on both sides.
Therefore, the unbalanced chemical equation is S r + O 2 → 2 S r O .
Explanation
Problem Analysis We are given four chemical equations and need to identify the unbalanced one. A balanced equation has the same number of atoms for each element on both sides. Let's analyze each equation.
Equation 1 Analysis Equation 1: C + O 2 → C O 2 . Left side: 1 Carbon (C) atom, 2 Oxygen (O) atoms. Right side: 1 Carbon (C) atom, 2 Oxygen (O) atoms. This equation is balanced.
Equation 2 Analysis Equation 2: S r + O 2 → 2 S r O .
Left side: 1 Strontium (Sr) atom, 2 Oxygen (O) atoms. Right side: 2 Strontium (Sr) atoms, 2 Oxygen (O) atoms. This equation is unbalanced because the number of Strontium atoms is different on both sides.
Equation 3 Analysis Equation 3: 6 H 2 + 3 O 2 → 6 H 2 O .
Left side: 12 Hydrogen (H) atoms, 6 Oxygen (O) atoms. Right side: 12 Hydrogen (H) atoms, 6 Oxygen (O) atoms. This equation is balanced.
Equation 4 Analysis Equation 4: H 2 + H 2 + O 2 → H 2 O + H 2 O .
Left side: 4 Hydrogen (H) atoms, 2 Oxygen (O) atoms. Right side: 4 Hydrogen (H) atoms, 2 Oxygen (O) atoms. This equation is balanced.
Conclusion The unbalanced equation is S r + O 2 → 2 S r O because it has 1 Sr atom on the left and 2 Sr atoms on the right.
Examples
Balancing chemical equations is crucial in many real-world applications, such as in the development of new drugs, the production of fertilizers, and the design of more efficient combustion engines. For example, when designing a new drug, chemists need to ensure that the chemical reactions involved in its synthesis are balanced, so that they can accurately predict the amount of reactants needed and the amount of product that will be formed. This ensures efficiency and minimizes waste, which is both economically and environmentally beneficial.
The unbalanced chemical equation is S r + O 2 → 2 S r O because it has 1 Strontium atom on the left and 2 on the right. The other equations are balanced, with equal numbers of atoms for each element on both sides. To have a balanced equation, the number of each type of atom must be the same on both sides of the reaction.
;
