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Sketch two pH curves, one for the titration of a weak acid with a strong base and one for a strong acid with a strong base. How are they similiar? How are they different? Account for the similarities and the differences.
Ammonium hydrogen sulfide decomposes according to the following reaction, for which Kp = 0.451 at a given temperature. If 55.0 g of NH4HS is sealed inside a 5.00 L container at this temperature, calculate the partial pressure of NH3(g) at equilibr..
The standard enthalpy and entropy for a slightly soluble salt at 25 degrees C were determined to be 71 kJ and 49 J/K respectively. Calculate the standard Gibbs Free Energy for this salt.
a 2.00 l sample of air at -50 degreees c has a pressure of 700 torr. what will be the new pressure in torr if the temp
Dibenzalacetone is commonly used in sunscreens. Suggest what properties are valuable in a compound for use as a sunscreen.
What wavelength of radiation will be emitted when an electron in a hydrogen atom jumps from the n=5 to the n = 1 principal energy level? Name the region of the electromagnetic spectrum corresponding to this wavelength
A mass of 137 g of manganese dibromide is dissolved in 330 g of water. What is the molality of the solution
Explain the general physics of chromatography. Illustrate these general principles with regard to paper, thin layer, gas, liquid, and super-critical fluid column and open tube chromatography.
A mixture containing 3.3 moles of NO and .85 mole of CO2 was allowed to react in a flask at a certain temperature according to the equation.
Acetic acid solution is titrated with NaOH solution. What is the pH at half the euivalence point?
1) Draw the form (structure) of ascorbic acid that is present at physiological pH (in the body; pH= 7.4). What diseases can be prevented and/or treated by the intake of ascorbic acid?
Describe and explain the possible effect on your results of the following experimental errors or variations. In each case specify the component(s) whose percentage(s) would be too high or too low.
If the sample contains a combined total of 1.50 mol and has a total mass of 45.0g, what are the percentages of CO2 and Ne in the sample by mole?
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