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Announcements To join clicker to class today: – Turn on the Clicker (the red LED comes on). – Push “Join” button followed by “20” followed by the “Send”

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Presentation on theme: "Announcements To join clicker to class today: – Turn on the Clicker (the red LED comes on). – Push “Join” button followed by “20” followed by the “Send”"— Presentation transcript:

1 Announcements To join clicker to class today: – Turn on the Clicker (the red LED comes on). – Push “Join” button followed by “20” followed by the “Send” button (switches to flashing green LED if successful). ● Exam 4 scores available on D2L. ● Bring possible errors to Dr. Gutow's attention as soon as possible. ● Wear appropriate clothes to Lab!

2 Review attractive interactions among molecules: –ion-ion (lattice energy: U=k(Q 1 Q 2 /d), calculation of U from a cycle of reactions ) –ion-dipole –dipole-dipole –dipole - induced dipole –Dispersion

3 Effect of H-bonding McMurry & Fay, Chemistry, Table 10.4 Figure showning that H-bonded molecules have unusually high boiling points.

4 Solvation of Ions fig 9.5

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