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Postby JamieVu_2C » Sun Jan 12, 2020 3:23 pm

The overall photosynthesis reaction is 6CO2(g) + 6H2O(l) C6H12O6(aq) + 6O2(g), and H = +2802 kJ. Suppose that the reaction is at equilibrium. State the effect that each of the following changes will have on the equilibrium composition: tends to shift toward the formation of reactants, tends to shift toward the formation of products, or has no effect.
(f) Water is added.

If water is added, why is there no effect on the equilibrium concentrations? Shouldn't adding water increase the production of products?

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Re: 5.61

Postby Ami_Pant_4G » Sun Jan 12, 2020 3:43 pm

Adding water has no effect because liquids and solids do not influence equilibrium or the K value, only aqueous and gasses do. Hope this helps.

Jesse H 2L
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Re: 5.61

Postby Jesse H 2L » Sun Jan 12, 2020 7:30 pm

we cannot increase the concentration of a pure solid or liquid in an equilibrium expression so it is regarded as equal to 1 and hence ignored in calculation.

Philomena 4F
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Re: 5.61

Postby Philomena 4F » Sun Jan 12, 2020 8:52 pm

The molar concentration of aqueous and gas molecules is the primary significant factor that can change the direction of an equilibrium reaction. It does not deal with pure solids and liquids, thus increasing water concentration will not shift the reaction nor influence its K value.

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