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Precipitates and Molar Concentrations
Suppose the two hydroxides YOH and Z(OH)2 both have Ksp=1.0 x 10-12 and that initially both Y+ and Z2+ are present in a solution at concentrations of 0.0010 mol L-1.
a) 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?
M. tuberculosis, the organism that causes tuberculosis, can be completely destoryed by irradiation with UV light with a wavelength of 254 nm. What is the frequency?
Consider a solution formed by mixing 61.0 mL of 0.100 M H2SO4, 26.0 mL of 0.100 M HOCl, 25.0 mL of 0.200 M NaOH, 25.0 mL of 0.100 M Ca(OH)2, and 10.0 mL of 0.150 M KOH.
When too much H2CO3 is in the blood, the enzyme carbonic anhydrase catalyzes the conversion of carbonic acid, H2CO3, to carbon dioxide, CO2, and water, H2O.
When calculating the density of your regularly shaped object, which measurement will limit your final result?
At 10 degrees, Kc = 56.3 for the reaction below. H2 + Cl2 --> HCl
Compute the change in temperature for 4.50 grams of Calcium chloride CaCl 2 dissolved in 90.0 mL of water H 2 O. (Assume that the calorimeter absorbs no heat )
For the gas-phase reaction 2 NO2 + F2 → 2NO2F, the rate constant k is 38 M-1s-1 at 27° C. The reaction is first order in NO2 and first order in F2.
A buffer is made by dissolving H3PO4 and NaH2PO4 in water. Write and equation that shows how this buffer neutralizes added bases.
What is the molarity of a solution prepared by adding 29.3 g of HNO3 to enough water to make 2 L of solution
A gas sample is held at constant pressure. The gas occupies 3.26L of volume when the temperature is 51.6 F . Determine the temprature at which the voloume of the gas is 3.45 L.
Calculate the number of moles of Cl atoms in 1.20×1024 of magnesium chloride, MgCl2.
3CuSO4 + 2Fe --> 3 Cu + Fe2(SO4)3 If you place .092 mol of iron filling in a solution containing .158 mol of CuSO4, what is the limiting reactant? How many moles of Cu will be formed.
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