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1.Find the pH of a 0.65 M solution of propionic acid. What is the fraction ionized at equilibrium?
2. What is the conjugate base of NH4+?
3. What is the conjugate base of hydrazoic acid? For any general weak acid, HA, HA(aq) + H2O(l) H3O+(aq)+ A-(aq) and Ka = a) What is the conjugate base of HA?
a) Write the equilibrium expression for this reaction. Is this the same as the Ka expression? What is different?
b) Ka values are ionization constants for weak acids in water.
If an excess of ammonia is added to the solution, solid [Cu(NH3)4]SO4xH20 (molar mass = 245.61 g/mol) forms. What is the theoretical yield of product from the reaction?
Draw and exlpain using representation of molecular orbitals the structure and bonding found in ethane; indicate clearly the structure
Why are monochromators (prism or grating monochromators) used in scanning instruments as opposed to absorption filters for
an experiment requires 42.0 of ethylene glycol a liquid whose density is 1.114 . rather than weigh the sample on a
A sample of nitrous oxide gas, N2O in a nonrigid container at a temperature of 33C occupies a certain volume at a certain pressure. What will be its temperature in degree Celsuis in each of the following situations
How many grams of F2 are needed to produce 158 g of PF3 if the reaction has a 79.8% yield?
Titration of a .7439g sample of impure Na2B4O7 required 31.64mL of .1081M HCl. Express the results of this analysis in terms in percent
What product or products would you expect to obtain by the addition of bromine to cis-cinnamic acid, assuming that it reacts by the same mechanism as the trans acid
Upon further analysis, the compound is found to be 25.305% C and 74.695% Cl. What is the molecular formula of the compound?
What techniques might you employ to induce crystallization if no crystals have formed after you cool the solution to room temperature.
Draw the products that correspond to syn addiction of Br2 to trans cinnamic acid and those that correspond to anti addition.
What is the difference between a hypothesis and a theory? a hypothesis is a proposal that has been tested extensively, whereas a theory is an initialy stated proposal a hypothesis is a conclusion made after a theory was tested words hypothesis
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