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A buffer solution contains 0.1 M CH3COOH and 0.1 M sodium acetate (that is, it has 0.2 M total buffering components of acetic acid + acetate). Calculate the pH after addition of 4 mL of 0.025 M HCl to 10 mL of the buffer. The pKa for acetic acid is 4.74.
Pretend you started with 3.15 g of Panacetin, and you isolated 822 mg of sucrose. What is the percent composition of sucrose in Panacetin?
What is the strongest type of intermolecular force in the following compounds? dipole-dipole, london desperison or hydrogen bounding
What is the change in internal energy (in J) of a system that releases 840 J of thermal energy to its surroundings and has 119 cal of work done on it? can you show work please the anser is -342
A bicycle tire is filled with air to a pressure of 720 torr at a temperature of 19 degrees Celsius. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58 degrees Celsius.
Assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts. Heat capacity of H2O(s) 37.7 J/(mol X K) Heat capacity of H2O(l) 75.3 J/(mol X K) Enthalpy of fusion H2O 6.01 KJ/m..
calculate the approximate amount of sodium thiosulfate pentahydrate needed to prepare 500mL
What is the molarity of the new solution compared to the molarity of the initial solution?
calculate the pH of this solution after the addition of 4.46 mL of 5.9 M nitric acid. The Kb of ethylamine is 6.4x10-4 some help would be awesome
A 3.026 g portion of a copper(II) salt was dissolved in a 250 ml volumetric flask. a %0 mL aliquot was analyzed by adding 1 g of KI and titrating the liberated iodine with 23.33mL of .046668M Na2S2O3. Find the weight percent of Cu in the salt.
What is the value of q when 7.12g of water vaporizes at 373 K? The enthalpy of condensation of water at 373 K is -40.7 kJ/mol.
Calculate the heats of combustion for the following reactions from the standard enthalpies of formation listed in the text- (a) 2H2(g) + O2 (g)--> 2H2O (l). (b) 2C2H2 (g) + 5O2 (g) --> 4CO2 (g) + 2H2O (l).
A solution was prepared by mixing 50.00 mL of 0.190 M HNO3 and 124.00 mL of 0.150 M HNO3. Calculate the molarity of the final solution of nitric acid.
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