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1. The pH of a 0.0023 M solution of sulfuric acid is?
2. A solution of barium hydroxide has a [OH-] = 5.6 x 10^-3 mol/L. The pH is which of the following?
a. 11.75
b. 12.25
c. 11.75
3. If the Kb of a weak acid is 2.9 x 10^-8, the Ka of its conjugate acid partner must be which of the following?
a. 2.9 x 10-8
b. 6.46
c. 7.54
d. 3.1 x10-7
e. 3.4 x 10-7
4. A weak acid with a concentration of 0.64 mol/L has a percent ionization of 4.5 x 10-4%. What is the pH of this weak acid?
5. What is the pH of a 0.45 mol/L solution of acetic acid if its Ka = 1.8 x 10^-5?
Just based on the orbital occupancy of electrons, is it justifiable to distinguish between the transition and inner transition elements? Should we consider any other factors?
A 25.0 mL sample of 0.10 M sodium benzoate is titrated with 0.10 M HCl(aq). What is the pH after the addition of 32.0 mL of HCl(aq)? (Kb of C6H5CO2- = 1.6 ´ 10-10)
Carbonyl fluoride, , is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride
Assume the mass of the dry air in the room stays constant at its initial value.
A stock solution of 1.24 x 10^-4 M dye is available in the lab. What volume of the stock solution must be transferred to a volumetric flask to prepare a 25.00 mL dilution with a concentration of 2.00 x 10^-5 M?
Methanol burns in oxygen to form carbon dioxide and water. Find delta Hrxn,Srxn, and Grxn all at 25 degrees celsius
Depict the skeletal structure of the organic species containing the carbonyl functionality required to form 3-ethyl-1-pentanol upon metal-catalyzed hydrogenation.
If the enery of the products is less than the energy of reactants then the speed of collision has no effect on the rate of the reaction. B) The energy of the collision of molecules must be great enough to overcome the bond energy of the products.
Construct a reaction table for the process, and use it to calculate Kc at this temperature.
Problem- A 500 mg die A 500mg dietary supplement of L-lysine (an amino acid, 146.2 g/mol) required 68.4 mL of 0.100 M NaOH to reach the end point. How many protons were removed for each L-lysine molecule in this titration
Copper metal and zinc metal react differently in the presence of certain acids. For example, while both react with concentrated nitric acid and dissolve completely, only zinc reacts and dissolves in dilute hydrochloric acid.
What is the purpose of washing the products of a dehydration of 2-Methylcyclohexanol with saturated aqueous sodium chloride and saturated aqueous sodium bicarbonate
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