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A compound has two carboxyl groups and one amino group. The pKas of the groups are 2.0, 4.4, and 8.9, respectively. A biochemist has 100 mL of a 0.1 M solution of this compound at a pH of 9. She adds 70 mL of 0.1 M HCl. What will be the pH of the solution after addition of the HCl?
Provide the reaction mechanism when p-acetaminobenzensulfonic chloride reacts with water
How much of the drug substance has to be used (calculate)? B) How much NaCl do you need to add to hace an isotonic preparation?
What is the standard reaction enthalpy for which the equilibrium constant is doubled when the temperature is increased by 10 C at 298 K
Use the enthalpies of bond formation to rationalize why nitrogen forms a dimer and phosphorous a tetramer.
How many mL of 2.00 M Na2CO3 is diluted with water to prepare 300 mL of 0.500 M Na2CO3
Assuming a current efficiency of 100%, if this same current is passed through a solution of TcO4 for the same amount of time, how many grams of Tc would form at the cathode
what mass of this substance must evaporate in order to freeze 190 of water initially at 24? the heat of fusion of water
Based on the solubility rules, which one of these is insoluble in water?
Calculate the number of molecules inside the cell, which is 3.6um long and 1.2 um in diameter.
What are the concentrations of OH- and H in a 0.00054 M solution of Ba(OH)2 at 25 °C? Assume complete dissociation.
Use the appropriate relationships from the chapter of electrons in Atoms to determine the wavelength of the line in the emission spectrum of He+ produced by an electron transition from n=5 to n=2
One Step is a product sold as a cleaner/sanitizer and has the formula 2Na2CO3?3H2O2. If 15.175 g of this compound is dissolved in water and diluted to exactly 1 gallon as directed
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