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The ammonia/ammonium buffer system is used to optimize polymerase chain reactions (PCR) used in DNA studies. The equilibrium for this buffer can be written as NH4+(aq)--><--H+(aq)+ NH3(aq). Calculate the pH of a buffer that contains 0.060M ammonium chloride and 0.075M ammonia. The Ka of ammonium is 5.6 x 10^-10.
Write the net ionic equations that account for the pH values of: 0.1M NH4Cl (pH 6.25), 0.1M NaC2H3O2 (pH 8.24)
What molar amount of hydrochloric acid is required for the fischer esterification of lauric acid
Purpose a mechanism for Sn2 reaction 1-chlorobutane with sodium iodide in acetone.
how many molecules of carbon dioxide are produced when 132 molecules of acetylene hcch to react in excess oxygen
CO(g) + NO2(g) ------> CO2(g) + NO(g) rate= k(NO2)^2 Suggest a plausible mechanism for the reaction, given that the unstable species NO3 is an intermediate.
what will the final mixture contain if 14.0 g of n2 and 35.5 g of cl2 react to completion and the balanced equation is
Calculate the Gibbs energy change for the denaturation of the protein at pH = 2 and T = 303 K. Assume the enthalpy and entropy are temperature independent between 298.15 and 303 K.
A 75 kg person drinks 550 g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 20% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake?
The value of Kc for this reaction is 5.0 at 600K. What are the equilibrium and partial pressures of the three gases if a reaction vessel initially contains a mixture of reactants in which Pco =Pcl2 = .215 atm and Pcocl2=0.000 atm
Predict that it was dissolved in HCl then mixed into the diethyl ether because diethyl ether is a base and since the benzoate contains an amine group they would remain unreactive with one another.
0.01M HCl reacts with 3.18 g Na2CO3. Here 50 mL of HCl is required for the reaction. Calculate the volume of CO2 produced at 273 K and 1 atm.
For each pair of amino acids listed below, predict which one would be first to elute from a cation-exchange column. Assume the buffer pH begins at 3.25 and is increased in a stepwise fashion to pH 6.
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