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A student has a solution containing a mixture of metal cations: Cu+2, Cr+2, and Fe+3, each a solution with NO3- anion. Adding a concentrated solution of NH4OH(aq) caused the precipitation of Cr+2 and Fe+3 as insoluble hydroxides. The Cu+2 remained in solution and forms the complex ion Cu(NH3)4+2. Which balanced molecular equations represent each of these reactions?
What mass of rm KCl is needed to precipitate the silver ions from 15.0 mL of 0.190 M rm AgNO_3 solution?
the density of thiophene, C4H4S is 1.065 g/mL. A solution is made by dissolving 15.0 g of thiphene in 250.0 mL of toluene. Calculate the Molarity
The initial rate of the following reaction when [A]=[B]=0.200M is 5.00X10^-3 M/s, What wil the rate be after 0.040M of A reacts with B?
You are a hazmat responder and walk into what appears to be a meth lab. There are flasks of iodine, White Gas fuel, Sodium Hydroxide, Nitric Acid, and a box of ephidrine.
How much heat is required to warm 219 g of ice from -45.7°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C
A compound is found to have a molar mass of 598 g/mol. If 35.8 mg of the compound is dissolved in enough water to make 175 mL of solution at 25°C, what is the osmotic pressure of the resulting solution?
suppose you chose phenolphthalein , which changes color at the end point from colorness(acidic) to pink at pH8.5 .Would you need the same , more or less volume of NaOH in the back-titration?
The solubility of a gas is 0.34 g/L at STP. What is its solubility at a pressure of 0.80 atm and the same temperature?
use a solid line to represent the correct calibration line and a dotted line for the line with the systematic error.) Also discuss the advantages and disadvantages of spectral methods of analysis.
The pH of a 0.40 M HF(aq) solution is 1.93. Calculate the change in pH when 0.356 g of sodium fluoride is added to 50.0 mL of the solution. Ignore any change in volume.
You transfer a sample of a gas at 17*C from a volume of 5.67L and 1.10atm to a container at 37*C that has a pressure of 1.10atm. what is the new volume of the gas?
An experiment was performed to determine the solubility and the solubility product constant of lead(II) chloride (gmm = 278.10).The equilibrium involved is
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