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1. List the major species in the solution ( I usually draw a picture of a bucket including species).
2. Find the species that produces H+ (or OH1-) and write the balanced equation including equilibrium constants.
- Don't forgot to include the auto-ionization of H2O1.
3. Using the values of the equilibrium constant for the reactions you have written, decide which equilibrium (or coming to completion) will dominate in producing H+ or OH1-.
4. Write the equilibrium constant expression for the dominant equilibrium.
5. Then following the ICE box method ( If you don't have look below).
5a. If needed, change mole into molarity (M). and state the initial conditions (into the ICE box).
5b. Figure out change and where "-" and "+" sign need for "x", Use Q if needed.
5c. Find equilibrium concentration including
6. Once have the [H+] or[ OH1-], then calculate pH or pOH as required.