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Question- 1. Could aqueous ammonia be used instead of hot water to separate lead ion from the mixed chloride precipitate? Explain.
2. The test for Ag+ is to add HNO3 and see if a precipitate of AgCl forms. Where does the Cl- come from? Why does adding HNO3 make AgCl precipitate? Write an appropriate balanced reaction.
3. In the step where Ag+ and Hg2+ are being separated by addition of 6 M NH3, a student obtains a black precipitate and a clear, colorless supernatant for both the known and the unknown. The student concludes that both cations are present because the results are the same.
Assess the student's conclusions for their accuracy, being sure to explain why the student is or is not correct for each cation.
Show all steps to describe the solution of above problem. Explain the each and every step in detail for help
0.65 of sodium hydroxide (NaOH) pellets are dissolved in water to make 2.5L of solution. What is the pH of this solution
5.00g of Mg was reacted completely with Cl2 to form MgCl2 and 63.0kJ of heat was evolved. what is the molar enthalpy of formation of MgCl2?
Fe(s) + 2HCL(aq)goes to FeCl2(aq) + H2(g) Change in enthalpy is -87.9kJ. How much heat is liberated at constant pressure if .368 g of iron reacts with 18.8mL of 0.568 M HCl?
What is the molarity of a solution prepared by dissolving 10.5 grams of NaF in enough water to produce 750 mL of solution
a. how many moles of stomach acid would be neutralized by onetablet of regualr strength maalox that contains 600mg of
electrode composed of nickel in a 1.0 M nickel(II) ion solution and another electrode composed of silver in a 1.0 M silver ion solution, connected by a salt bridge. Calculate the standard potential for this cell at 25 °C.
A particular compound contains, by mass, 41.4 % carbon, 3.47 % hydrogen, and 55.1 % oxygen. A 0.050-mol sample of this compound weighs 5.80 g. What is the molecular formula of this compound
Polonium crystals have a simple cubic unit cell. If the edge length of a unit cell is 310. pm, what is the radius a polonium atom
methanol is produced commercially by the catalyzed reaction of carbon monoxide and hydrogencog 2 h2g ch3ohgan
The decomposition of KClO3 proceeds spontaneously when it is heated. Do you think that the reverse reaction, the formation of KClO3 from KCl and O3 is likely to be feasible under ordinary conditions
Draw the expanded structural formula for the following condensed formula.
Lithium fluoride(LiF) exhibits predominantly ionic bonding. THe Li+ and F- ions have elctron structures that are identical
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