Practice Equilibrium Constant in Chemistry
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
The ratio of product concentrations to reactant concentrations at equilibrium, each raised to its stoichiometric coefficient.
K is the scoreboard at the end of the game — it tells you which side won. Large K means products dominate; small K means reactants dominate.
Showing a random 20 of 50 problems.
Example 1
mediumFor a reaction with , how are and related?
Example 2
easyIf , what does that say about products and reactants at equilibrium?
Example 3
easyWrite the equilibrium expression for .
Example 4
mediumReaction has at K. After increasing , becomes . Is the forward reaction endothermic or exothermic?
Example 5
hardTwo reactions: : , . : , . Find for .
Example 6
mediumAt equilibrium M, M for . Find .
Example 7
challengeFor , equilibrium gives , , M. Compute .
Example 8
mediumIf , what is for the reverse reaction?
Example 9
mediumFor , M and M at equilibrium. Find .
Example 10
mediumFor , and M at equilibrium. Find .
Example 11
mediumFor , . If reaction 2 is , what is ?
Example 12
mediumWrite for the heterogeneous equilibrium .
Example 13
easyWhat is the symbol for the reaction quotient (not at equilibrium)?
Example 14
challengePhosgene decomposes: , at . A L flask holds mol initially. Find at equilibrium.
Example 15
mediumA reaction has . If M at equilibrium, find .
Example 16
mediumA reaction has and . Which direction does it shift?
Example 17
hardFor in the gas phase at , and L·atm/mol. Find .
Example 18
easyA reaction has . Are products or reactants favored at equilibrium?
Example 19
easy uses ____ instead of concentrations for gaseous species.
Example 20
easyWrite for .