Editing Steps For Equilibrium Calculations
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1. List the major species in the solution ( I usually draw a picture of a bucket including species).<br> <br> 2. Find the species that produces H<sup>+</sup> (or OH<sup>1-</sup>) and write the balanced equation including equilibrium constants.<br> *Don't forgot to include the auto-ionization of H<sub>2</sub>O<sub>1</sub>. <br> 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<sup>+</sup> or OH<sup>1-</sup>.<br> <br> 4. Write the equilibrium constant expression for the dominant equilibrium.<br> <br> 5. Then following the ICE box method ( If you don't have look below).<br> 5a. If needed, change mole into molarity (M). and state the initial conditions (into the ICE box).<br> <br> 5b. Figure out change and where "-" and "+" sign need for "x", Use Q if needed.<br> <br> 5c. Find equilibrium concentration as equation.<br> <br> 5d. Fill in the equilibrium constant expression with the appropriate number and/or equation.<br> <br> 5e. Solve mathematically (with calculator) or try the 5% rule simplification. <br> <br> 5f. Solve for "x" and then determine equilibrium concentrations for all species especially H<sup>+</sup> and/or OH<sup>1-</sup>. If used 5% rule, check to make sure it is appropriate.<br> <br> 6. Once have the [H<sup>+</sup>] or[ OH<sup>1-</sup>], then calculate pH or pOH as required.<br> <br>
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