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What is the fraction of association (α) for the following potassium propionate solutions? Ignore activities. The Ka of propanoic acid is 1.34 × 10-5. (a) 3.00 × 10-1 M K(C2H5CO2) (b) 3.00 × 10-2 M K(C2H5CO2)
How would the ground-state energy levels of X and H compare (where X is an atom with one electron like Hbut different energy levels)? For X: E = - (RH / n3) and RH is the same as H (2.179 ×10?18J).
Describe in brief the risk connected with solutions of 1M NH 3 , 1M HCl, and 1M NaOH?
What volume of 0.128 M Li2S solution is required to completely react with 170. mL of 0.128 M Co(NO3)2?
What is the chemical symbol for this element? Use stoichiometry to create an equation that allows you to solve for the molecular weight of X.
Krypton crystallizes as a fcc (face centered cubic unit cell) having an edge length of 559 pm. What is the density of solid Krypton?
Suppose that you wished to prepare copper(II) carbonate by a precipitation reaction involving Cu2+ and CO32-. Select all of the pairs of reactants that could be used as solutes
Tablets from a bottle of commercial aspirin gave a negative test with FeCl3. Several months later, tablets from the same bottle gave a positive test with FeCl3. How do you account for this result? Why?
A 500 mL buffer solution containing 0.2M fomic acid and 0.25 sodium formate is mixed with 100ml of 0.05M HCl. What will be the pH of this new solution
Use a combination of balanced chemical equations and their K's to calculate the equilibrium constant for the titration of formic acid with NaOH, which you used in the previous question. (Hint: You will need to include the value of Kw at some point..
acetic acid has one carbon- oxygen bond that is 1.36 A nd another 1.23 A however sodium acetate has two equal carbon- oxygen bonds
The rate constant are 0.039 L/mol-1*s-1for the forward reaction (CO2 + H2O ? H2CO3) and 23 s-1for the reverse reaction (H2CO3 ? CO2 + H2O). What is the order of the reverse reaction
How many grams of LiCl are needed to make a saturate solution with 300 grams of H2O if the molality of the solution is 19.7.
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