1. What does the equilibrium constant's numeric value tell us about a system's composition in the equilibrium? 2. The concentration of solids or solvents is not part of the equilibrium constant. Why? 3. One way to quantify Ca2+ ions in solution is by adding fluoride ions to form a white, dense precipitate. a) Write the net ionic equation for the reaction mentioned above. b) If the concentration of Ca2+ is 0.035mol/L and the volume of the solution is 125mL, what is the volume of a 0.30mol/L solution of fluoride needed to precipitate all the Ca2+ in the solution? Assume that the yield of the reaction is 100%. c) What is the number of moles of precipitate produced? 4. Consider the reaction to answer the questions below: Cr3(aq)+MnO411(aq)Cr2O72(aq)+Mn2+(aq)(acidicsolution) a) Write the balanced half-reactions. b) Write the balanced reaction. c) If a reaction starts with 1.0mol of Cr3(aq), how many mols of electrons are produced? d) If a reaction consumes 3.0 mols of electrons, what is the mass of Mn2+(aq) produced? Mn=54.94 g/mol