Answer to Question #55401 in General Chemistry for Aleshia
2. Lead ions an be precipitated from aqueous solutions by the addition of aqueous iodide: Pb+2(aq) + 2I-2 (aq) =PbI2(s) . Lead iodideis virtually insoluble in water so that the reaction appears to go to completion. How many milliliters of 1.180 M HI(aq) must be added to a solution containing 0.200 mol of Pb(NO3)2 (aq) to completely precipitate the lead?
3. What is the molarityof a NaOH solution if 15.5 mL of a 0.220 M H2SO4 solution is required to neutralize a 25.0 mL sample of the NaOH solution?
4. Aqueous solutions of a compound did not form precipitates with Cl-, Br-, I-, SO4-2, CO3-2, PO4-3, OH-, or S-2. This highly water soluble compound produced the foul-smelling gas H2S when the solution was acidified. This compound is _______.
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