surfactants - Lower Mid-Atlantic

Question

These molecules have good foaming ability when their head group is anionic. For 10 points each:

[10m] Name these molecules, the main active ingredient of detergents. These amphiphilic molecules aggregate into spherical micelles that remove grease and soiling particles.

ANSWER: surfactants [or surface-active agents; accept anionic surfactants]

[10h] Detergent surfactants reduce the surface tension of water by undergoing this process at the liquid-air interface. Irving Langmuir developed an isotherm model of this process that assumes the formation of a monolayer.

ANSWER: adsorption [accept word forms like adsorbing; accept Langmuir adsorption isotherm or Langmuir adsorption model; prompt on binding; reject “absorption”]

[10e] Many detergents also contain enzymes, biological examples of these substances. These substances increase the rate of chemical reactions but are not consumed in the process.

ANSWER: catalysts

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Summary


Northern California	Main	Y	4	25.00	100%	100%	50%
Southern California	Main	Y	7	14.29	100%	29%	14%
Eastern Canada (1)	Main	Y	4	12.50	100%	25%	0%
Eastern Canada (2)	Main	Y	9	11.11	89%	22%	0%
Florida	Main	Y	4	15.00	100%	50%	0%
Great Lakes	Main	Y	11	16.36	100%	55%	9%
Lower Mid-Atlantic	Main	Y	9	14.44	100%	33%	11%
Upper Mid-Atlantic	Main	Y	9	13.33	100%	22%	11%
Midwest	Main	Y	9	14.44	89%	33%	22%
North	Main	Y	4	17.50	100%	50%	25%
Pacific	Main	Y	8	15.00	100%	50%	0%
South Central	Main	Y	6	15.00	100%	50%	0%
Southeast	Main	Y	12	10.83	100%	8%	0%
UK (North)	UK	Y	5	12.00	100%	0%	20%
UK (South)	UK	Y	8	11.25	100%	0%	13%
Upstate NY	Main	Y	1	20.00	100%	100%	0%

Data


Virginia Tech B	JMU A	10	0	10	20
William & Mary A	Liberty A	0	0	10	10
Liberty C	Liberty B	0	0	10	10
Virginia Tech C	NCSU A	0	0	10	10
UNC A	NCSU B	10	0	10	20
VCU A	Tusculum A	10	0	10	20
UNC B	Virginia Tech A	0	0	10	10
Virginia A	UNC D	0	10	10	20
Duke A	William & Mary C	0	0	10	10