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1.) a. what metal cations are separated in the qual scheme by forming sulfide preciptates in the acidic solution?
b. what metal cations form sulfide precipitates in basic solution in qual scheme after the above cations have been removed?
c. Qualitativley explain, why the pH of the sulifide solution effects which cations precipitate.
How many moles of sulfate ions (SO2-/4) are present in 1.6 moles Al2(SO4)3
in experiment to find emperical formula of magnesium oxide, why the empty crucible and cover fired to red?
A balloon contains 0.120 of gas and has a volume of 2.83 .If an additional 7.2×10?2 of gas is added to the balloon, what will its final volume be
Assuming the solution has a heat capacity of 4.18 J/°C · g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
how many no. of hydrogen ions are present in 10 millionth part of 1.33 cc of pure water at 25 degree celsius.
which of the following are oxidation reduction reactions? a)Ca(s)+F2(g)>CaF2(s) b)Fe(s)+2HCl(aq)>FeCl2(aq)+H2(g) c)2NaCl(aq)+Pb(NO3)2(aq)>PbCl2(s)+2NaNO3(aq) d)2CuCl(aq)>Cu(s)+CuCl2(aq)
A 25:75 mixture of acetone:toluene is heated to 70 C at a pressure of 760 mmHg. What is the total vapor pressure of the system? Is the system a liquid below boiling, at boiling, or a gas?
Calculate the number of free electrons per cubic meter for copper, assuming that there is one free electron per copper atom. The electrical conductivity and density
Draw all of the products of the second propagation step in the free-radical bromination of 2,3-dimethylbutane including inorganic
A mixture of FeO and Fe2O3 with a mass of 10.0 g is converted to 7.43 g Fe of pure Fe metal. What are the amounts in grams of FeO and Fe2O3 in the original sample
A 100 mL of a 0.100 M solution of vinegar (acetic acid, CH3COOH) is mixed with 100 mL of a 0.100 M baking soda (sodium bicarbonate) solution and a reaction proceeds that generates carbon dioxide, water and sodium acetate.
Glycerol HOCH2CH(OH)CH2OH is a nonvolatile, water-soluble material. its density is 1.25 g/mL. Predict the vapor pressure of a solution of 2.40 x 10^2 mL of glycerol, in 395 mL of water, at the normal boiling point of water.
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