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Preparing a 0.050 M buffered solution using a conjugate weak acid/weak base pair. You will prepare 100 mL of buffered solution with pH = 7. The formal concentration of this buffer should be 0.050 F (i.e., the total concentration of the weak acid and its conjugate base is 0.050 M)
Sodium phosphate monobasic and sodium phosphate dibasic
The average distance between planet X and Earth is about 2.59 x 108 miles. How long (minutes) would it take pictures transmitted from a space vehicle on Planet X's surface to reach Earth
Explain how many grams of sodium hydroxide should be added to the solution to produce a concentration as close as possible the desired 0.1000 M? Presume that the sodium hydroxide is carbonate-free
The molecules CO2 and SCL2 are both of the general molecular type AB2, but one is polar and one is not. Which molecule is polar?
the decomposition of 2hi to h2 i2 at 508c has a half like of135 min when the initial pressure of hi is 0.10atm and
The photon was emitted sommewhere in deep space, long ago by a helium atom undergoing a downward transition from 3p to 2s state. Determine the wavelength, energy and frequency of this photon.
Explain why BaCO3 is soluble in aqueous HCl, but BaSO4, which is used to make the intestines visible in X-ray photographs, remains sufficiently insoluble in the HCl in a human stomach so that poisonous barium ions do not get into the bloodstream.
There are two stable isotopes of gallium. their masses are 68.9257 amu and 70.9249 amu. If the average atomic mass of gallium is 69.73 amu, what is the natural abundance of the lighter isotope
Explain Copper (Cu) dissolves in nitric acid (HNO3), producing copper (II) nitrate, Cu (NO3)2, nitrogen dioxide (NO2) and H2O. Explain what mass of NO2 could possibly be produced by the reaction of 5.00g of Cu and 25.0 g of HNO3
When 0.040 mol of propionic acid, C2H5CO2H, is dissolved in 300 ml of water, the equilibrium concentration of H3O+ ions is measured to be 1.23 x 10-3 M.
Suppose you dip a string in a supersaturated sugar solution to make rock candy. The string is dipped in corn syrup, then sugar, then placed in the sugar solution. After a few days of sitting in the solution, the string should have some rock candy ..
What volume of chlorine gas at 25.0 ºC and 855 mm Hg pressure is required to react with 84.0 g of phosphorus as given in the above equation
Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2 g of ammonia are reacted with 787.3 g of carbon dioxide. Which of the two reactants is a limiting reactant.
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