Write the solubility product expressions for Fe3(PO4)2. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).

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Try Again Check your exponents. Write the concentration equilibrium constant expression for this reaction. 3 1₂(s) + 2 Cr³+ (aq) + 7 H₂O(1)→ Cr₂O² (aq) +61¯ (aq) + 14 H* (aq) [₂0][₁][H]¹⁹ 3+ [¹] Η + 19 X Ś 00

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What is the solubility product expression for Co(OH)3? Ksp= [Co3+][30H] Ksp= 3[Co3+][OH73 Ksp= [Co3+][OH73 Ksp= [Co3+][30H]3 Ksp= [Co3*][OH]

A highly acidic (pH< 0.5) industrial wastewater has an initial AlP" concentration of 10 ppm. An engineer decides that strong base should be added to the wastewater in order to raise the pH so that most of the aluminum will precipitate and be removed from solution. The pertinent solubility reaction from Appendix A of our text is: Al(OH)3 (s) → Al* + 30H¯ with pK, = 32.9 a. What is the lowest pH needed to precipitate all but 50 ppb of the aluminum from the wastewater? Assume equilibrium conditions can be achieved. b. Suppose the engineer decides that the pH should be raised to 7. What equilibrium concentration of aluminum would be left in solution? Report your answer in ppb and moles per liter.

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1. In this experiment we measured K, for borax Na,B,O,(OH), 8H,0(s)=2Na*(aq)+B,0,(OH),² (aq)+8H,0(1) write down K, for this reaction in terms of reactants/product sp concentrations We measured the concentration of the borate by titrating it with HCl to make boric acid B,O,(OH), (a) + 2 HCI( aq) + 3 H,O(I) → 4 H,BO, + 2CI (ag) the pH at the equivalence point is pH = 4. 2. What indicator did we use, and what color was the indicator at the equivalence point? 3. At 48.2°C, 5.00ml of the saturated solution of bo ax was titrated with 0.235M HCI. It took 23.00 mL of the a id to reach the equivalence point. 1. What is the molarity of the tetra-borate anion in t e solution? 2. What is Kn for borax at this temperature?

can you help me calculate the number of moles for the first three substances?