21. solution. Ka for HC1O = 3.018×10-8, Please answer the following questions about a 0.1672 M NaClO solution at 25 °C? A. B. C. The whitening ability of household bleach generally comes from the presence of sodium hypochlorite, NaCIO, in the What is the equilibrium concentration of H3O+ in the solution? Please provider your answer below. 0² 0₂ Check answer What is the equilibrium concentration of OH in the solution? Please provider your answer below. Check answer What is the pH of the solution? ☐☐ Please provider your answer below. S S M M

1. A saturated solution of Mg(OH)2 is prepared having a large excess of Mg(OH)2. Sn(NO3)2 is added to the solution. Ksp = 2.0 ✕ 10-11 for Mg(OH)2 and Ksp = 5.3 ✕ 10-26 for Sn(OH)2. a) What [Sn2+] is required to start the precipitation of Sn(OH)2? b) What [Sn2+] is required so that the [Mg2+] in solution will be 0.12 M?   2. Solid NaI is added to a solution which is 0.025 M in TlNO3 and 0.015 M in AgNO3. Assume the volume remains constant. Ksp = 8.9 ✕ 10-8 for TlI and Ksp = 1.0 ✕ 10-16 for AgI. a) Which compound precipitates first TII or AgI?   b) What is the concentration of the first ion precipitated when the second ion starts to precipitate?       3. What is the molar solubility of PbSO4 in 0.19 M MgSO4? Ksp = 1.0 ✕ 10-8 for PbSO4.

What hydroxide concentration is required to initiate precipitation of Al3+  from a 2.90x10-2  M solution of Al2(OH)3? The solubility-product constant for Al(OH)3  is 3x10-34.  M lower the Al3+ concentration in the foregoing solution to 4.20x10-7 M?  M

Consider a solution of calcium ion and oxalate ion ate equilibrium with solid calcium oxalate.  Explain what would happen to the amount of solid if the following stress was added. Show all secondary reaction if happened.             Ca2+(aq)  +  C2O42- (aq)                CaC2O4(s) a. Adding OH- solution, Ca(OH)2(s) formed b. Adding H+ solution, H2C2O4(aq) formed.