Lab 3 - Chemical Bonding Fundamentals PDF

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Lab 3 – Chemical Bonding Fundamentals

September 10, 2020

Pre-Lab Questions: 1a.) 26 b.) 20 c.) 19 d.) 8 e.) 7 f.) 1 2.) The difference in electronegativity 3.) Iconic bond; it’s formed with metals and nonmetals 4.) Polar Molecules (Formed when two atoms don’t share electrons equally) H2 O

HF

Non-Polar Molecules (Formed when two atoms share electrons equally) C O2

C H4

Experiment 1: Slime Time Table 1 – Results of Ink Testing for Slime Name of Ink

Picked up (dissolved)

Picked up (dissolved)

Trial 1

Trial 2

Picked up (dissolved) Trial 3

Did not pick up

Did not pick up

Did not pick up

Trial 1

Trial 2

Trial 3

Newsprint Highlighte r uni-ball® Roller Pen Permanent Marker Dry Erase Marker

Table 2 – Results of Ink Testing for Silly Putty® Name of Ink

Picked up (dissolved) Trial 1

Picked up (dissolved) Trial 2

Picked up (dissolved) Trial 3

Did not pick up Trial 1

Did not pick up Trial 2

Did not pick up Trial 3

Newsprint Highlighte r uni-ball® Roller Pen Permanent Marker Dry Erase Marker

Hypotheses and Observations: Part 1: Watery, Slippery Part 2: 1.) Slime will pick-up water-soluble ink 2.) Silly Putty will pick-up insoluble ink Part 3: The highlighter spread the most while the dry erase marker and permanent marker did not move at all Post-Lab Questions:

1.) Water soluble inks, “like dissolves like” – water is polar just as water soluble inks are polar 2.) Slime picked-up the highlighter (which was proven polar) whereas the Silly Putty did not (which proves it is non-polar and unable to pick-up water-soluble inks) 3.) All of the inks were properly classified as soluble and insoluble except for the uni-ball® Roller Pen which was neither proven neither soluble nor insoluble in the experiment...