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Question: Briefly, explain how to make an acetic acid/ acetate buffer? Give the chemical reaction between this buffer and a small addition of base (OH-), which explains why the pH of the solution remains about the same?
The net potential energy EN between two adjacent ions is sometimes represented by the expression: EN = -(C/r) + D exp(-r/p) in which r is the interionic separation and C, D, and p are constants whose values depend on the specific material.
a radioisotope used to evaluate heart function in exercise stress tests, decays by capturing one of its own core electrons. it also emmits gamma rays. write an equation for its nuclear decay, then identify the daughter isotope
A voltaic cell is constructed by immersing a strip of silver in a 1.0M AgNO3 solution and a strip of cadmiun metal in a 1.0M Cd(NO3)2 solution. The circuit is completed by a wire and a salt bridge in the usual way. What is the cell potential for t..
when liquid water is introduced into an evacuated vessel at 25c some of the water vaporizes. preshydict how the
Which of the following indicators would be the best to use when 0.050 M benzoic acid (Ka = 6.6 *10^-5) is titrated with .05 M NaOH
The total pressure of a mixture of N2O4 and NO2 is 1.5 atm. If Kp=7.1 (at 25 degrees C) calculate the partial pressure of each gas in the mixture.
The following solutions were mixed together: 50.0mL of a 0.761M FeSO4 and 20.0mL of a 1.05M K2Cr2O7 (in dilute sulfuric acid). What is the molar concentration of Cr+3 ions in the resulting solution
Sodium sulfate dissolves as follows: Na2SO4(s) 2Na+(aq) + SO42- (aq). How many moles of Na2SO4 are required to make 1.0 L of solution in which the Na concentration is 0.10 M.
A 10.0 mL aliquot of this weak acid solution was titrated with a 0.0498 M NaOH solution. The equivalence point was reached by adding 11.62 ml of NaOH from the buret. What is the molar mass of this unknown acid
Arrange the following aqueous solutions in order of increasing freezing points (lowest to highest temperature): 0.10 m glucose, 0.10 m BaCl2, 0.20 m NaCl, and 0.20 m Na2SO4.
Choose the answer in which the three atoms and/or ions are listed in order of increasing EXPECTED size (smallest particle listed first) assuming that the simple shell model of the atom is correct.
Given an equation and an enthalpy change, how much heat is involved when a certain amount of an element
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