Given H 2 + I 2 ---> 2HI determine which way the reaction will shift when: 1. H

Question

Given H2 + I2 ---> 2HI determine which way the reaction will shift when:

1. H2 is removed (answer in a sentence why it shifts left or right)

2. HI is removed (answer in a sentence why it shifts left or right)

3. The volume of container is increased. (answer in a sentence why it shifts left or right)

Given H2 + I2 right arrow 2HI determine which way the reaction will shift when: 1. H2 is removed (answer in a sentence why it shifts left or right) 2. HI is removed (answer in a sentence why it shifts left or right) 3. The volume of container is increased. (answer in a sentence why it shifts left or right)

Explanation / Answer

1) shifts left as according to LeChatelier's Principle, the reaction will try and regains it value of Kc by decreasing amount of HI. It does so by shifting the position of equilibrium to the left. This makes more H2 and I2 by using up HI.

2) shifts right ,According to LeChatelier's Principle, the chemical system will attempt to replace the lost HI. The stress was to remove HI, so the opposite is to replace it. The equilibrium position will shift to the right in order to replace some of the lost HI.

3) Neither side is favored over the other since both sides have the same number of total molecules (two). No matter which way the reaction shift, the total number of molecules would remain unchanged.

In cases like this, where there is an equal number of molecules on each side, the equilibrium would remain unchanged by the change in pressure (in either direction).

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