Pregunta
Pure liquids are excluded from the
equilibrium constant expression.
True
False
equilibrium constant expression.
True
False
Ask by Savage Hamilton. in Malaysia
Mar 22,2025
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Pure liquids are excluded from the equilibrium constant expression.
Solución
- In an equilibrium expression, the activity (or effective concentration) of species in pure liquid or solid form is defined as 1.
- Since their activities are constant, these substances do not appear in the equilibrium constant expression.
- Therefore, pure liquids are excluded from the equilibrium constant expression.
The statement is
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True! When calculating the equilibrium constant (K), only the concentrations of gases and aqueous solutions count. Pure solids and liquids, like water or ice, don’t change their concentration during a reaction, so they’re left out of the equation. It’s like skipping the background dancers in a concert—they’re there, but they’re not part of the main show!
For example, in the reaction where graphite © turns into gas (C(g)), the equilibrium expression would only consider the gaseous carbon, not the solid graphite. It helps keep the focus on the elements involved in the balance of the reaction. So, always remember: pure liquids and solids just hang out on the sidelines in the world of equilibrium!
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