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Consider the titration of 35.0 mL of 0.165-M of KX with 0.131-M HCl. The pKa of HX = 7.91. Give all pH values to 0.01 pH units. a) What is the pH of the original solution before addition of any acid? pH = b) How many mL of acid are required to reach the equivalence point? VA = mL c) What is the pH at the equivalence point? pH = d) What is the pH of the solution after the addition of 30.0 mL of acid? pH = e) What is the pH of the solution after the addition of 52.9 mL of acid?
Briefly discuss the importance of the principles of solubility and miscibility when choosing extraction solvents
A sample of gaseous C2H2 (acetylene, or ethyne) was stored for one year, yet at the end of this period the sample remained unchanged and no graphite or hydrogen gas had been formed. Briefly explain why there is no inconsistency between the sign of..
If 18.26 grams of sulfuric acid are reacted with a large amount of aluminum metal, what volume of hydrogen gas would be produced at STP?
a sample of 1.0 mole of a perfect gas with cp= 20.8 JK -1 is initially at 3.25 atm and 310 k. It undergoes reversible adiabatic expansion until its pressure reaches 2.50 atm. calculate the final volume and temperature and the work done
A student wants to prepare exactly 1000 mL of a 0.500 M aqueous potassium hydroxide solution. What mass of potassium hydroxide should the student dissolve in the solution?
How long will it take 10.0 mL of neon gas to effuse through a porous barrier if it has been observed that 91.2 minutes are required for 10.0 mL of Cl2 gas to effuse through the same barrier?
As we discussed in class, we are not necessarily limited to using a minimal basis set. We may write the molecular orbitals as a linear combination of as many atomic orbitals as we wish.
What is it about the structures of poly(acetylene) and poly(p-phenylenevinylene), and not poly(1-butene), that allows these polymers to conduct electricity? Use discussions of hybridization, pie bonding, and resonance as the basis for your argumen..
The temp rises to 17.9 degrees celsius. Neglecting heat capacity of container, what is the specific heat of the metal? The specific heat of H2O(l) is 4.18 J/(g*degree Celsius)
The name of this covalent compound is nitrogen trioxide. d. The name of this ionic compound is manganese oxide.
Given that the Ka of boric acid is 5.8x10^-10M, what is the pH of a 0.50M boric acid solution? Are there any good approximation available?
What advantages and disadvantages exist for both organic and inorganic solar cells? Describe the main barriers or technical difficulties associated with each.
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