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A solution containing a mixture of metal cations was treated with dilute HCl and no precipitate formed. Next, H2S was bubbled through the acidic solution. A precipitate formed and was filtered off. Then, the pH was raised to about 8 and H2S was again bubbled through the solution. A precipitate again formed and was filtered off. Finally, the solution was treated with a sodium carbonate solution, which resulted in no precipitation. Which metal ions were definitely present, which were definitely absent, and which may or may not have been present in the original mixture? Ag+, Hg2^2+, Pb2+, Sn2+, Mg2+, Al3+, Li+, Ca2+ , Cu2+, Hg2+, Ni2+, Sb3+
a solution of sodium cyanide (NaCN) has a pH of 12.10. How many grams of NaCN are in 425 mL of solution with the same pH
The specific heat of silver is .24 j/g. How many joules of energy are need to warm 4.37g from 25 to 27.5 ?
Three gases, nitrogen, helium, and krypton are confined in a 9.00 L vessel at a pressure of 7.00 atm. The vessel contains 5.00 moles of nitrogen, 2.00 moles of helium, and 2.00 moles of krypton. What is the partial pressure of helium
What concentration of CO3^2- is need to initiate precipitation. Neglect any volume changes during the addition.
A lump of copper is heated with 225 J of energy. Its temperature rises by 11.5 oC. How many grams does this lump weigh
If 4.50 moles of ethane, C2H6 undergo combustion,according to the unbalanced equation C2H6+O2--> CO2+H2O, how many moles of oxygen are required?
A solution is prepared by diluting 0.0342 mol acetic acid with water to a volume of 8.39 L. What is the pH of the solution
Use the following data to plot the inflection points for the heating curve of 1 mole of solid octane at its melting point, -56.8 degrees C. The first point should be at -56.8 and the last point should be at 150 degrees celcius.
which hydroxide precipitates first as NaOh is slowly added to the solution? b) what is the molar concentration of the first cation precipitated when the other cation just starts to precipitate out of solution?
Calculate the concentrations of all species in a 0.225 M solution of phenylammonium chloride, C6H5NH3Cl.
Assuming the [potato extract] is 0.001 M and you are going to make a 10 mL solution and each drop is 1/20th of a mL calculate the [potato extract] in each reaction solution.
What type of transport is used to take up the ribose in I. facto and in your answer,explain all the data. What is the source of energy for the transport of the ribose?
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