Answer:

Chemical Reaction:
- The given chemical equation is not balanced. The balanced equation for the reaction between nitric acid (HNO3) and calcium hydroxide (Ca(OH)2) is:
2HNO3(aq) + Ca(OH)2(aq) → Ca(NO3)2(aq) + 2H2O(l)

Explanation:
- In this reaction, nitric acid (HNO3) reacts with calcium hydroxide (Ca(OH)2) to form calcium nitrate (Ca(NO3)2) and water (H2O).
- The reaction is a double displacement reaction where the hydrogen ions from nitric acid combine with the hydroxide ions from calcium hydroxide to form water.
- The remaining ions then combine to form calcium nitrate.

Balancing the Equation:
- The equation is balanced by ensuring that the number of atoms of each element is the same on both sides of the equation.
- In this case, the equation is balanced by placing a coefficient of 2 in front of nitric acid (HNO3) and water (H2O) to balance the number of atoms of each element.

Final Balanced Equation:
2HNO3(aq) + Ca(OH)2(aq) → Ca(NO3)2(aq) + 2H2O(l)

Conclusion:
- The balanced chemical equation for the reaction between nitric acid and calcium hydroxide is necessary to accurately represent the substances involved and the products formed in the reaction. The balanced equation ensures that the law of conservation of mass is obeyed.