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If 3.55 g of CuSO4 are dissolved in 925 mL of 0.30 M NH3, what are the concentrations of Cu2+, Cu(NH3)42+, and NH3 at equilibrium Kf, Cu(NH3)42+= 1.1 x 1013 . Assume that most of the Cu2+ is convert
The solubility product of Mg(OH)2 is 1.2 x 10-11. What minimum OH- concentration must be attained to decrease the Mg2+ concentration in a solution of MgCl2 to less than 1.0 x 10-9 M.
Which of the following ionic compounds will be more soluble in acid solution than in water? Explain your choice/s Determine whether the anions are basic and use Le Chatelier's principle.
Describe how you will prepare a H2PO4-/HPO42- buffer using solid sodium dihydrogen phosphate and sodium hydrogen phosphate (pH 7.4, 500 mL 0.40M each). How much solid is needed to prepare each solut
How many oxygen atoms are there in 52.06 g of carbon dioxide? Hint: How many O atoms does each carbon dioxide molecule contain
Determine the balanced net ionic equation when aqueous solutions of AgNO3 and NaI are mixed. The balanced net ionic equation is:
In acid-base equilibria, the strength of acids and bases are reflected by their Ka's and Kb's, respectively. Explain, using examples while Ksp cannot directly reflect the solubility of the ionic com
The concentration of Mg2+ in seawater is 0.052 M. What is the pH when 95% of the magnesium ions will be precipitated as the hydroxide salt. (Ksp, Mg(OH)2 is 8.9 x 10-12).
If 60.0 g of H3PO4 is dissolved in enough water to form 175 mL of solution, what is the molarity (M) of the solution
Discuss the common-ion effect by comparing the solubility of CaCO3 in 3.0 x 10^2 mL of water and in the presence of 0.015 mol of Ca(NO3)2.
A 20.0-L nickel container was charged with 0.835 atm of xenon gas and 1.44 atm of fluorine gas at a 400 degrees C. the xenon and fluorine reacts to form tetrafluoride. what mass (G) of xenon tetrafl
If 2.50 g CuSO4 are dissolved in 8.0E2 mL of 0.25 M NH3, what are the concentrations of Cu2+, Cu(NH3)42+, and NH3 at equilibrium
What is the volume of a container that contains 12.4g of a substance having a density of 0.898g/cm3
How many grams of carbon dioxide (CO2) can form when a mixture of 4.95 g of ethylene (C2H4) and 3.25 g of oxygen is ignited. Assume complete combustion to CO2 and H2O.
calculate the ph of a 0.070 M sodium acetate CH3COONa and 0.020M acetic acid CH3COOH buffer The ka is 1.7x10^-5
During a lab experiment, we were to determine the relative level of saturation by adding, drop by drop, a solution of bromine in cyclohexane to oil and a fat, individually. However, the color that i
phosphorus has the molecular formula P4 and sulfur has the molecular formula S8. How many grams of phosphorus contain the same number of molecules as 6.4 g of sulfur.
Determine the entropy change for heating nitrogen gas from 25 oC to 100oC under the following conditions. Cp =29.1J·K?1 ·mol?1.
Rank the following reactions in terms of increasing ?E for the reaction system (from most negative to most positive). All occur at a constant pressure of 1.000 atm.
What is the pH of buffer that consist of 0.20 M NaH2PO4 and 0.40 M Na2HPO4? Ka=6.2x10^-8
A new atom is found that has 3 isotopes with masses of 262, 263 and 265. If the first is 0.17 abundant and the second is 0.41 abundant, what is the atomic mass of the element (give your answer to 2
The Ksp of CuI is 1.1X10^-12. Find Ecell for the cell: Cu(s)|I^-(aq)(1.0M)||Cu^+(aq)(1.0)M|Cu(s)
A reaction has the following rate law Rate = k[A][B]2. In experiment 1, the concentrations of A and B are both 0.10 mol L-1; in experiment 2, the concentrations are both 0.30 mol L-1. If the tempera
The vapor pressure of pure water at 25°C is 23.77 mm Hg. What is the vapor pressure, in mm Hg of water above a solution that is 3.500 m glucose, C6H12O6
how many days does it take for 16g of palladium-103 to decay to 1.0g? the half life of palladium -103 is 17days