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A 100.0 mL sample of 0.20 M HF is titrated with 0.10 M KOH. Determine the pH of the solution after the addition of 100.0 mL of KOH. The Ka of HF is 3.5 × 10-4
How many grams of NH4Cl must be added to 424 mL of a 0.69 M solution of NH3 to prepare a pH = 9.00 buffer.
combined in an 1 L reaction volume, what would be the concentration of B at equilibrium?
Chemical bottles labeled to contain blue-coloured NISO4 -6H20 often contain instead the green-coloured NISO4-7H2O.
Problem- Calculate the resolution for a 1115.5 keV Zn peak that has a FWHM of 2.01 keV. 1) Calculate the resolution for a 1115.5 keV Zn peak that has a FWHM of 200 keV.
Calculate the minimum mass of Pu-238 (in kilograms) that would had to have been loaded on the spacecraft at the time of its launch from earth.
The activation energy for a particular reaction is 64 kJ/mol. By what factor will the rate constant increase when the temperature is increased from 50 oC to 80 oC
The nitrate ion (NO3-) is a very poor nucleophile. In fact, solvents such as water or methanol (also weak nucleophiles) are more reactive nucleophiles than the nitrate ion
The neutrons from one treatment source have an average velocity of 3.5 x 10^7 m/s. When the velocities of the individual neutrons are known to within 2% of this value, define the uncertainty in this position of one of them?
Methyl red is an indicator that changes between yellow and red. In solution methyl red (HMR) dissociates as follows:
The atomic mass of chlorine is listened as 35.454 amu on the periodic table. It has two naturally occuring isotopes CL 35 and Cl 37. What are the approximate percentages.
The figure shown below shows a typical titration curve for 0.1 M NaOH with 40 mL of 0.05M oxalic acid (H2C2O4). The first equivalent point is ~ at 9 .0 mL and the second equivalent point is at ~18 mL.
Which of the subsequent statements correctly explain thehydronium-hydroxide balance in a given solution
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