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Predict if the following conditions would result in the formation of a preecipitate: a. 0.0025 M Fe3+ at pH 6.00 b. 0.0025 M Ba2+ and a 1.25x10^-4 M solution of sodium sulfate c. 0.05 M Ca2+ and a 1.25 x 10^-4 M solution of cesium phosphate d. 7.92 x 10^-15 M solution of Hg2+ and a saturated solution of H2S at a pH of 0.5.
Provide a structure for the following compound: EI mass spectrum: two molecular ions of about equal intensity at m/z = 180 and 182; IR: 1740 cm-1; 1H NMR
Li is in row 2 of the periodic table, Na is in row 3, and K is in row 4. How do their row numbers affect how their electron configurations end.
Explain in your own words why an organic chemist would say structure determines properties.
what is the pH of a solution prepared by dissolving 4.5 g HCl in water to make 410 mL of solution?
The decay constant for strontium- 90 is 0.0247 y^-1. how many grams of strontium-90 remain if 10.0g decay for exactly 60 years.
Classify each of the following reactions as combination, decomposition, single replacement, or double replacement: a) CuO(s)+2HCl(aq)-->CuCl2(aq)+H2O(l); b) 2Al(s)+3Br2(g)-->2AlBr3(s); c)Pb(NO3)2(aq)+2NaCl(aq)-->PbCl2(s)+2NaNO3(aq); d)2Mg(s)+O2(g..
What mass of NaHCO3 must be added to 1.00 L of 0.10 M Na2CO3 to make a buffer solution whose pH=9.85? pKa2(H2CO3)=10.33
At equilibrium, the concentration of the product methanol was found to be 0.060 M. The value of the equilibrium constant Kc for this reaction is
Back titration with .02127 M Zn2+ at pH 5 reqired 23.54ml to reach the xylenol orage end pt. a 2.00ml sample of unknown was passed thru an ion-exchange column designed to absorb co2+. the Ni2+ that passes thru ion-exchange column was treated with ..
An aqueous antifreeze solution is 40.0% ethylene glycol, C_2H_6O_2, by mass. The density of the solution is 1.05 g/ml. Calculate the molality of the ethylene glycol.
Given the following data H Cl bond enthalpy = +431 kJ/mol, ?Hf HCl(g) = -92.31 kJ/mol
The reaction below reaches equilibrium in a closed reaction vessel. The enthalpy change for the forward reaction is +135 kJ/mol. Does the mass of Na 2 CO 3 increase, decrease or stay the same if the mixture is transferred to a smaller reaction ves..
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