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The difference in electronegativity between adjacent atoms participating in a covalent bond drives the formation of a polar molecule. Water molecules are polar and their interaction with each other, via the partial positive and partial negative ends of the molecule, can create very interesting physical properties within a large body of water. Surface tension is a result of this strong interaction between the poles of neighboring water molecules at the water-surface interface. What if we could make different liquids have increased surface tension like water? Which liquids would you choose to increase their surface tension and why?
Construct a molecular-orbital diagram for a chain containing six lithium atoms and use it to answer the following questions. How many molecular orbitals are there in the diagram? How many nodes are in the lowest-energy molecular orbital?
What is the pH of a 0.17 M solution of oxalic acid, H2C2O4. The Ka1,2 values of oxalic acid are 5.6 x 10-2 and 5.4 x 10-5.
For my prelab questions I was asked "During the work up, the product layer is washed one with water, once with 5% sodium bicarbonate solution, and once again with water. What is the purpose of these washings".
solute a has a partition coefficient of 3 between toluene and water with 3 times as much in the toluene phase. suppose
what would be the ph of a solution of hypoiodous acid hoi prepared by dissolving 144 grams of the acid in 200 ml of
Explain why the absolute value of the work done by a process can never be greater than the absolute value of the Helmholtz free energy change.
Calculate the pH of a solution made by adding 69 g of sodium acetate, NaCH3COO, to 37 g of acetic acid, CH3COOH, and dissolving in water to make 200. mL of solution.
Nitrogen froms a trifluoride, NF3, but Nf5 does not exist. For phosphorous, both PF3 and PF5 are known. Write Lewis structures for NF3, PF3 and PF5 discuss possible explanations for the fact that PF5 is stable,
Calculate the pH of each of the following solutions. (a) 0.115 M HONH2 (Kb = 1.1 10-8)
Express the concentration of a 0/0200 M aqueous solution of fluoride, F-, in a mass percentage and in parts per million. Assume the density of the solution is 1.00 g/ml
Buffer solution will be prepared using (CH3)2NH2+ and (CH3)2NH conjugate acid/base pairs. To prepare the buffer, 50.0 mL of 0.084 M (CH3)2NH2+ (Ka = 1.68x10^-11) was mixed with 72.6 mL of 0.064 M KOH. Calculate the resulting pH of the solution.
A solution of calcium ions contains 7 meq/250. cm3 of calcium ion. How many moles of calcium ion does this solution contain
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