1. Find the solubility of MgCO3 in water assuming a pH of 7.50. Ksp MgCO3=3.5 e-8 Ka1 H2CO3=4.45 e-7 Ka2=4.69 e-11 Step 1. Write all pertinent equilibrium reactions Step 2. Write the charge balance equation Step 3. Write the mass balance equation Step 4. Write the equilibrium constant for each chemical reaction Step 5. Count the equations and unknowns (# equations > # unknowns?) Step 6. Calculate the solubility of [Mg2+].
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1. Find the solubility of MgCO3 in water assuming a pH of 7.50.
Ksp MgCO3=3.5 e-8
Ka1 H2CO3=4.45 e-7
Ka2=4.69 e-11
Step 1. Write all pertinent equilibrium reactions
Step 2. Write the charge balance equation
Step 3. Write the mass balance equation
Step 4. Write the equilibrium constant for each
Step 5. Count the equations and unknowns (# equations > # unknowns?)
Step 6. Calculate the solubility of [Mg2+].
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