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A solution is prepared by dissolving 0.23 mol of acetic acid and 0.27 mol of sodium acetate in water sufficient to yield 1.00 L of solution. What is the pH change (?pH) caused by the addition of 0.05 mol of HCl to this buffer solution? The pH does not change drastically because the HCl reacts with the ________ present in the buffer solution. The Ka of acetic acid is 1.4 × 10-4.
What length of mirror drive in a Michelson interferometer is required to produce a resolution sufficient to separate a) infrared peaks at 500.6 and 500.4 cm-1
The Fe^2+/Fe half-cell reduction potential is -0.41 V, and the H+/H2 half-cell reduction potential is 0.00 V. What is the value of Eo for this cell, and which electrode is the anode
A voltaic cell consists of a Mn/Mn2+ electrode (E°= -1.18 V) and a Fe/Fe2+ electrode (E°= -0.44 V). Calculate [Fe2+] if [Mn2+] = 0.050 M and Ecell = 0.78 V at 25°C.
Determine the rate constant. b. What fraction of the initial N2O5 will remain after 13.0 h c. What is the half-life. d. If the initial concentration of N2O5 was 0.222 M, then what concentration remain after 24 h
A reaction rate has a constant of 1.28/mol*s at 433 degress C and 24.0/mol*s at 533 degrees C. Determine the activation energy for this reaction.
A volume of 18.0 contains a mixture of 0.250 , 0.250 , and an unknown quantity of . The temperature of the mixture is 0 , and the total pressure is 1.00 . How many grams of helium are present in the gas mixture
Determine the partial pressure and total pressure of the gases and Find the partial pressure of carbon dioxide in a gas mixture
A 2.0*10^-3 M solution of manganese (II) sulfate is gradually made more basic by the addition of a 1.0 M solution. At what pH will manganese (II) hydroxide begin to precipitate? (Ksp = 2* 10^-13
determine the partial pressure and the total pressure in a 2.50 L vessel containing the following mixture of gases at 17.8 degrees celsius
Write a complete reaction mechanizm for this based catalysed transesterification reaction. Rather than starting with a complete oil molecule , given for thereaction between the follwoing ester andmethanol in the presence of NaOH
Which of the following atoms is least likely to form an ion. A) fluorine B) magnesium C) silicon D) sodium 2.For which of the following atoms do we not try to apply the octet rule? A) oxygen B) nickel C) sodium D) xenon
Complete the following neutralization reaction, and identify the strong acid, strong base, weak acid and/or weak base.
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