Explain the differences between interstitial and vacancy diffusion. Interstitial Diffusion Choose. Choose. Requires no vacancy in order to operate/move. The movement of diffusing atom requires a vacancy in the lattice for it to move into. Occurs primarily when the diffusing atoms are of similar size or substitutional atom. Interstitial Diffusion Interstitial Diffusion This mechanism is found for interdiffusion of impurities. Occurs when the diffusing atom is small enough to move between the atoms in the lattice. Both self-diffusion and inter-diffusion occur by this mechanism. Vacancy Diffusion Vacancy Diffusion Choose. Vacancy Diffusion Choose.

Consider the structure of a base. - H,C- Modify the structure to draw the conjugate acid. Add or delete atoms, bonds, charges and non-bonding electrons where appropriate. Select Draw Templates More /||||||| C H H₂C- Ec: Erase

Please answer part b

For the following reaction, identify the Brønsted-Lowry acid, base, the conjugate acid and base. Draw the correct curved arrow mechanism. predict the position of the equilibrium and identify the most acidic compound (stronger acid) and most basic compound (stronger base) || OH ||| . + IV

Highlight in red each acidic location on the organic molecule at left. Highlight in blue each basic location on the organic molecule at right. Note for advanced students: we mean acidic or basic in the Brønsted-Lowry sense only. NH₂ NH₂ × G

Rank the following compounds in order of decreasing basicity, putting the most basic compound first. NH₂ A. || > | > ||| > IV B. | > | > ||| > IV C. | > ||| > | > IV D. IV> | > ||| > | NH₂ Br III NH₂ F3C IV NH₂

1. HO. HN a. polar/non-polar; b. Neutral/acidic/basic c. Also write whether the side chain is Hydrophobic/Hydrophilic 2. H2N CH- он CH2 a. polar/non-polar; b. Neutral/acidic/basic c. Also write whether the side chain is Hydrophobic/Hydrophilic

Try: Ph 1. LDA, THF, -78°C 2. PhSeCl 3. H₂O₂ 1. LDA, THF, -78°C 2. Warm to 25°C 3. PhSeCl 4. H₂O₂

Show the products of this acid-base reaction and predict whether the equilibrium favors the reactants or the products. Use curved arrows. the acid is listed first. Is it reactant favored or product favored?