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100 mL of a buffer that consists of 0.20 M NH3 and 0.20 M NH4Cl is titrated with 25 mL of 0.20 M HCl. Calculate the pH of the resulting solution given that the Kb for NH3 is 1.8 x 10-5. The correct answer is: 9.03
When preparing the solutions for Part A, an aqueous solution of diamine and NaOH is made. Why isn't a solution of NaOH and diacid chloride in cyclohexane made
A voltaic cell consists of a strip of lead metal in a solution of Pb(NO3)2 in one beaker, and in the other beaker a platinum electrode immersed in an NaCl solution, with Cl2 gas bubbled around the electrode. The two beakers are connected with a sa..
for a parallel reaction a giving b and c the reaction rate constant k1 4.8 times10-7 s-1 the selectivity between c and
what is the pressure of dry H2 in mmHg. and in atm. Assuming the ideal gas behavior, how many moles of H2 gas were collected
1.use the three-step method described in the module to predict the actual precipitates which form if such is the case
calculate the moles of oxygen gas produced fro 4.40mol H2O2. 2H2O2(i) ---->2H2(g) + O2(g) Express your answer with the appropriate.
The result of doubling the inital concentration of x will be to? a) shroten the half-life of the reaction b) increase the rate of constant of the reaction c) decrease the rate constant of the reaction D) Shorten the time taken to reach equilibrium..
Which condition characterizes the stoichiometric point of any acid/base titration? a) equivalent molar amounts of acid and base have reacted. b) The pH is exactly 7.0 c) The indicator changes from pink to colorless
The hydrochloric acid has a density of 1.18 g/ml and contains 35.0% HCl by mass. What is the percent of the metallic zinc in the original sample. Assume that the impurity in the zinc does not affect the HCl.
Use the three-step method described in the module to predict the actual precipitates which form (if such is the case) when the following solutions are mixed
what would happen to the pressure of a confined gas sample if the volume of that sample was decreased while the
A helium-filled weather balloon has a volume of 714 L at 23 oC and 750 mmHg. It is released and rises to an altitude of 3.78 km, where the pressure is 546 mm Hg and the temperature is -2oC. The volume of the balloon at this altitude is
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