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New YorkChemistryQuick questions
Kinetics, Equilibrium, Acids and Bases
Quick questions on Equilibrium and Le Chatelier's principle - Regents Chemistry
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is concentration?Show answer
Adding a reactant or product shifts the equilibrium away from the added substance (the system consumes the excess); removing a substance shifts toward it (the system replaces it). Adding more reactant therefore pushes the reaction toward products.
What is temperature?Show answer
Treat heat as a reactant or product. For an exothermic forward reaction, heat is a product, so adding heat shifts toward reactants and cooling shifts toward products. For an endothermic forward reaction, the reverse holds.
What is pressure?Show answer
Increasing the pressure on a gaseous equilibrium shifts it toward the side with fewer moles of gas; decreasing the pressure shifts it toward the side with more gas molecules. Count the gas-phase coefficients on each side. Pressure changes have no effect if both sides have equal numbers of gas molecules.
What is q1?Show answer
State what happens to the rates of the forward and reverse reactions at equilibrium. [1 point]
What is q2?Show answer
For a gaseous equilibrium with moles of gas on the left and on the right, state the direction of shift when pressure is increased. [1 point]
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