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Water autoionizes to produce hydronium ion and hydroxide ion. The product of the concentrations of these ions equals the water autoionization constant, Kw. This ionization constant depends on temperature, the enthalpy change, and the entropy change associated with the reaction. Because the enthalpy change of this reaction is _____, the pH of pure water _____ with decreasing temperature.
A) positive, increases
B) positive, decreases
C) negative, increases
D) negative, decreases
E) zero, does not change
How many grams of sodium fluoride should be added to prepare the buffer solution? Neglect the small volume change that occurs when the sodium fluoride is added.
In the reaction of noroborene to noroborenol, the exo, and endo forms are created. Why exactly is the exo form favored over the endo form
If you titrate 1.0 g of H2O2 solution (30wt%) with KMnO4, 25.05 ml of this KMnO4 solution is used. What is the molarity of KMnO4?
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The solubility of oxygen in lakes high in the Rocky Mountains is affected by the altitude. If the solubility of O2 from the air is 2.67 × 10-4 M at sea level and 25°C.
What is the concentration of acetate when 500mL of 0.47M acetic acid is added to 500mL of a pH 5.7 solution
Predict what volume (mL) of 0.3000 M NaOH is required to titrate 25 mL of 0.3000 M HCl to the equivalence point
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Derive an expression for the number of molecules with a speed (c) greater than some specified speed (c'). Recall that the number of molecules having speed in a certain range is the integral under the Maxwell-Boltzmann speed distribution curve ..
A 1.000-mL aliquot of a solution containing Cu2 and Ni2 is treated with 25.00 mL of a 0.03632 M EDTA solution. The solution is then back titrated with 0.02254 M Zn2 solution at a pH of 5. A volume of 18.39 mL of the Zn2 solutio..
Which of the following has only a single peak in the proton NMR spectrum
sodium 24 has a half life of 15 hours. how much sodium 24 will remain from a 10.0-g sample after 60 hours?
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