1. Identify the reactants and products:
* Reactants: Hydroiodic acid (HI) and calcium hydroxide (Ca(OH)₂)
* Products: Calcium iodide (CaI₂) and water (H₂O)
2. Write the unbalanced equation:
HI + Ca(OH)₂ → CaI₂ + H₂O
3. Balance the equation:
* Calcium (Ca): The equation has one Ca atom on each side, so it's balanced.
* Iodine (I): There is one I atom on the left and two on the right. Add a coefficient of 2 in front of HI:
2HI + Ca(OH)₂ → CaI₂ + H₂O
* Oxygen (O): There are two O atoms on the left and one on the right. Add a coefficient of 2 in front of H₂O:
2HI + Ca(OH)₂ → CaI₂ + 2H₂O
* Hydrogen (H): There are four H atoms on each side, so it's balanced.
4. Balanced Equation:
The balanced chemical equation for the reaction is:
2HI + Ca(OH)₂ → CaI₂ + 2H₂O
