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Problem- If a buffer solution is 0.230 M in a weak acid (ka= 3.4x10^-5) and 0.590 M in its conjugate base, what is the pH?
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three portions of the same liquid are mixed in a container that prevents the exchange of heat with the environment.
A sample of gas occuplies a volume of 62.7 mL. As it expands, it does 120.3 J of work on its surroundings at a constant pressure of 783 torr. What is the final volume of the gas
Write the reaction equations for the acid-catalyzed dehydration of the following alcohols showing all the possible alkene products. Give the IUPAC name for each product and predict the major product in each reaction.
An aqueous solution of hydroiodic acid is standardized by titration with a 0.174 M solution of sodium hydroxide. If 30.5 mL of base are required to neutralize 29.2 mL of the acid, what is the molarity of the hydroiodic acid solution?
A catalyst decreases the activation energy of a given reaction by exactly 15 kJ/mol. By what factor does the reaction rate increase at 25oC when the catalyst is used. Assume that the Arrhenius pre-exponential factor, A, is the same for the catalyz..
An impure sample of sodium carbonate, Na2CO3, is titrated with 0.150 M HCl according to the reaction below. 2HCl(aq) + Na2CO3(aq) yields CO2(g) + H2O(l) + 2NaCl(aq)
An aqueous solution made by dissolving 168 mg of an unknown compound (a nonelectrolyte) in enough water to make 500.0 mL of solution, develops an osmotic pressure of 5.22 torr at a temperature of 23.5 °C. What is the molecular weight of this unkno..
Acetone, CH3COCH3 , is a nonelectrolyte; hypochlorous acid, HClO, is a weak electrolyte as well as ammonium chloride, NH4Cl is a strong electrolyte.
how many grams of oxygen gas are requirednbsp if it is desired to inflate a baggie withnbsp 842 milliliters volume by
Consider the following qualitative analysis scenario and then classify what type(s) of qualitative analysis principle is/are being used. More than one choice may be correct.
Adrenaline is a hormone released in response to physical and mental stress. A solution is prepared with 1.5g of adrenaline in 175g. of CCl4 (Tf= -22.3 degrees celcius and Kf = 29.8 C/m.) The freezing point of the solution was determined experiment..
The initial mass of the the crude ether was 141 mg. The mass after recrystallization was 121 mg. Calculate the percent recovery from recrystallization.
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