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You are provided with an aqueous solution containing 0.050 M Mg2+ and 0.050 M Cu2+ ions and are asked to try to separate them. Explain what concentration of OH- is needed to begin precipitation of each cation? Ksp = 1.8 x 10-11 for Mg(OH)2; Ksp = 4.8 x 10-20 for Cu(OH)2.
Rank the following atoms (from smallest to largest) based on which would have the largest second ionization energy?
Using the entropies at 298 K, the heat capacities of the substances involved, and such other data as are necessary, calculate the standard entropy of reaction (ΔS°) at 1000 K for the reaction:
element x crystallizes in a body-centered cubic lattice. it satomic mass is 59 amu. the edge length of a unit cell of x
A 32.1 g iron rod, initially at 23.0^C, is submerged into an unknown mass of water at 63.4^C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 59.4^C.What's the mass of water
54.5 grams of ice initially at -5°C is added to 475 grams of liquid water initially at 49.5°C in a thermally insulated container. What is the temperature of the water once the contents of the container reach thermal equilibrium
The first step in the industrial recovery of zinc from zinc sulfide ore is roasting, that is, the conversion of ZnS toZnO by heating: calculate the heat of reaction
when 7.00 moles of gas A and 3.00 moles of gas B are combined, the total pressure exerted by the gas mixture is 1.0 atm. What is the partial pressure exerted by gas a in this mixture
Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the minimum concentration of {\rm KOH} required for precipitation to begin in each case.
calculate the standard reaction enthalpy for the formation of boron trifluoride which is widely used in the chemical
question the equivalent weight of a metal is double than that of oxygen. how many times is the weight of its oxide
The aspirin componet weighs only 250mg. What is the w/w% aspirin inthe time release tablet?
a solution of h2so4 with unknownconcentration was titrated with the standard base with .0233molarity. a volume of
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