Answer to Question #171270 in General Chemistry for Sarah Khan

Question

1. Hydrogen gas (colorless) reacts with pure iodine vapor (purple) to give hydrogen iodide gas (colorless).
2. Write a balanced equation for this reaction.
3. If the equilibrium mixture of these three gases is light purple in color, what change in color would you expect to observe if more hydrogen gas were added to the system? Justify.
4. If the equilibrium mixture of these three gases is light purple in color, what change in color would you expect to observe if some of the hydrogen iodide gas were removed from the system? Justify.
5. Consider the following equilibrium: Heat + CaCO3 (s) CaO (s) + CO2 (g)
6. If the pressure of CO2 (g) increases, in which direction will the equilibrium shift? Justify.
7. If the temperature is increased, in which direction will the equilibrium shift? Justify.
8. If the temperature is decreased, in which direction will the equilibrium shift? Justify.

Answer 1

1. H₂ (g)+ I₂ (g) $\to$ HI (g)

2. Balanced equation H₂ (g)+ I₂ (g) $\to$ 2HI (g)

3. darker purple

4. darker purple

5. Heat + CaCO₃ (s) $\to$ CaO (s) + CO₂ (g)

6. shift right

7. shift right

8. shift left