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The pKb values for the dibasic base B are pKb1 = 2.1 and pKb2 = 7.6. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.50 M B(aq) with 0.50 M HCl(aq). (a) before addition of any HCl (b) after addition of 25.0 mL of HCl (c) after addition of 50.0 mL of HCl (d) after addition of 75.0 mL of HCl (e) after addition of 100.0 mL of HCl
Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.100 M phosphoric acid solution.
a steel sphere has a radius of 1.58in. If this steel sphere has a density of 7.88g/cm3, what is the mass of the sphere in grams?
how much energy is released when 89 grams of water vapor (steam) is cooled from 503 K to 354 K?
The product formed by the reaction of 3-methyl-1-butene with mercuric sulfate and sulfuric acid is?
draw all three resonance structures for the carbocation intermediate that results from STEP 2 in the electrophilic aromatic substitution reaction when benzoic acid reacts with Br2 in the presence of FeBr3
What is the effective concentration between the ends if you consider the characteristic ratio of dna?
This method assumes that no argon was trapped in the rock when it was formed frothe molten material. A meteorite was found to have equal amounts of 40K and 40Ar. a) Of the potassium-40 that was originally present, what fraction has decayed? b) how..
Explain the large disparity in the numerical results pf Part (a). Discuss the advantages and disadvantages of the three energy sources.
A 0.90g sample of liquid water was introduced into an evacuated 2.00 L flask, which was then sealed and heated to 37 (degree)C. What percentage, by mass, of the water remained as liquid
Tris is widely used in a biochemical laboratory. Its acid dissociation constant is 8.32 x 10^-9. You have available at your lab bench a 0.1 M solution of Tris in its protonated form, 0.1 M solution of HCL and NaOH,
Describe and explain the possible effect on your results of the following experimental errors or variations. (a) You stopped the steam distillation after collecting 3 mL of distillate
If the ionization constant of water, Kw, at 40°C is 2.92 x 10-14, then what is the hydronium ion concentration and pH for an acidic solution
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