what other techniques are similar to protein crystallization?

1)Let’s say that you recovered 80% trimyristin (after recrystallization, so the final product) from the 2 g of nutmeg you initially started with.

a- If you completed the hydrolysis reaction (see lab) to make myristic acid and glycerol, what would be your theoretical yield of myristic acid?

b- If you recovered 1.72 g of myristic acid, what would be your percent recovery of myristic acid?

c- What might account for sources of error in your recovery?(Give 3 plausible reasons)

PLEASE SHOW ME YOUR STEPS!!

Consider the following unbalanced redox equations: a. I

Describe what is meant by an electrical double layer (EDL) that occurs at the interface between an electrode and the solution

Discuss Dalton’s theory. What are all of the postulates? With recent discoveries about the nature of an atom, does it still apply today?

Describe electronegativity and relate it to the bonds water makes.

A 1.00-g sample of piperazine hexahydrate is dissolved in enough water to produce 100.0 mL of solution and is titrated with 0.500 M HCl.

A.) What is the initial pH of the solution, before any titrant is added?

B.) The percent neutralization points for a titration indicate the percent of the reagent that has reacted. For example, at the 25% neutralization point for piperazine, 75% (0.75×[Pip]) of the base remains, and 25% is neutralized to form PipH+.

Calculate the pH at the 25%, 50%, and 75% neutralization points of the first neutralization, respectively.

C.) What is the pH at the first equivalence point?

D.) The percent neutralization points for a titration indicate the percent of the reagent that has reacted. For example, at the 25% neutralization point for PipH+, 75% (0.75×[PipH+]) of the base remains, and 25% is neutralized to form PipH22+.

Calculate the pH at the 25%, 50%, and 75% neutralization points of the second neutralization, respectively.

Please show all work!

How is the operon activated in E.coli that grow on lactose?

(a) A vessel is separated into two parts, A and B, by a bilayer lipid membrane containing Na+ channels. Part A holds an aqueous solution of NaCl with concentration 0.15 mol L-1 and of disaccharide sucrose with concentration 0.01 mol L-1 . Part B holds an aqueous solution of NaCl with concentration 0.015 mol L-1 . Calculate the electrical potential between the two sides of the membrane at 30 oC and at 50 oC. Neglect the effect of temperature on the molarity of the solutions. Assume that the membrane is not permeable for glucose and for Cl ions.

What conditions must be true about a weak acid solution in order to use the Henderson‐Hasselbalch equation to find solution pH and in what region of a titration curve do these conditions exist?

Match each term to the correct definition.

A. Chemical separation

B. Gravity filtration

C. Physical separation

D. Vacuum filtration

E. Evaporation

F. Heterogeneous mixture

G. Homogenous mixture

H. Distillation

I. Extraction

J. Decantation

-varies in composition, distinct clumps of each component appear in the mixture

-uniform in composition, the components cannot be visually distinguished

-uses heat to remove a volatile solvent from a dissolved solution, leaving behind the non-volatile components as a solid residue

-exploit some difference in the physical properties of two species in order to separate them

-exploit reactivity to convert one component to a new species which can be easily separated from the other components that are present

-uses a solvent to selectively dissolve one component while leaving other components in the solid state

-uses gravity to pull the liquid through a filter paper to separate a liquid from a solid

-uses a vacuum to pull the liquid through a filter paper to separate a liquid from a solid.

-The process of pouring a solution off a heavy solid that settles to the bottom of the container

-Takes advantage of the difference in the boiling point between the two components

What volume (to the nearest 0.1 mL) of 5.20-M NaOH must be added to 0.500 L of 0.350-M HNO₂ to prepare a pH = 3.50 buffer?

A gaseous mixture contains 421.0 Torr of H2(g), 392.9 Torr of N2(g), and 68.1 Torr of Ar(g). Calculate the mole fraction, X, of each of these gases.