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A 1.00 Gram sample of an unknown acid is dissolved in water and titrated with 0.150 N KOH to the Phenolphthalein endpoint. It takes 28.32mL of base to complete this titration. A second sample of this acid weighing 2.00 grams is added to the titrated sample and the pH is 4.32. Calculate the molar mass of the unknown acid and determine the value of Ka for this acid.
Suppose an ice cube weighing 44.7 g at a temperature of -4 degree celcius is placed in 550 grams of water at a temperature of 23 degrees celcius.
magnesium ion solution and another electrode composed of silver in a 1.0 M silver ion solution, connected by a salt bridge. Calculate the standard potential for this cell at 25 °C. Standard reduction potentials
What is the pH after 13.3 mL of base is added? The Ka of butanoic acid is 1.5 X 10^-5.
The half-life for the second order reaction of a substance A is 55 seconds when [A]o is 0.84 M. What time is needed for the concentration to decrease to 1/4 of the original value.
calculate the concentration of Hg2 +2 in a saturated aqueous solution of (Hg2)3[Co(CN)6]2 which dissociates into mercurous ion and Co(CN)6 -3 (cobalticyanide).
At what temperature will the bottom of a column of mercury of height 30.0 feet be expected to freeze? Use the data given below for mercury:
The dipole moment (mu) of HBr (a polar covalent molecule) is 0.82 D (debye), and its percent ionic character is 12.1%. Estimate the bond length of the HBr bond in picometers.
The quantity of atmoshperic SO2 (g) can be determined by reaction with H2O2 (aq), according to the balanced chemical equation...
Which of the following pairs of substances are miscible and which are not?
After equilibrium was established, which of the ions listed below was present in the greatest concentration?A) H2C6H5O7^-
The electron sea is localized between two metal atoms at a time. 4. The metal is held together by the attraction between the metal ion cores and the sea of valence electrons
What is the volume in centimeters cubed of a marble with the diameter of 1.5 cm? Use the formula Volume = 4/3 pi x (radius)3.
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