Week 4 DQs and weekly assignment

Week 4 DQs

DQ1-

Post your 150+ word response to the following question:

How do over-the-counter calcium carbonate or magnesium carbonate antacid medications work? What are some other examples of medications that perform similar functions? How do they work?

DQ2 –

Chemically, what takes place when a car battery is discharged and recharged? What other power sources transfer power through chemical reactions? Provide a brief description of how power is created.?

DQ 3-

Boysen KNOxOUT contains CristalActiv photocatalytic technology, which is ultrafine titanium dioxide, (TiO2) that absorbs energy from light and transforms ordinary water vapor into hydroxyl and peroxyl radicals at the surface of the TiO2. These free radicals, created in billionths of a second, become the reactive species that break down noxious air pollutants such as nitrogen oxides (NOx) that come into contact with the surface. Harmful NOx gas is converted to nitric acid that is rapidly neutralized by alkaline calcium carbonate particle in the paint, producing harmless quantities of calcium nitrate and negligible amounts of carbon dioxide and water. Calcium nitrate is water soluble and easily removed from the film, leaving a fresh surface ready to engage the next pollutant to come into contact with the film. A great advantage of this photocatalytic reaction is that the ultrafine TiO2 is not consumed in the reaction, but is merely a catalyst that continuously generates free radicals as long as there is sufficient light, air and moisture. Additionally, this reaction gives the paint self-cleaning and anti-bacterial properties. Class, do you have any thoughts on Boysen KNOxOUT paint? How Boysen KNOxOUT Paint Works?

Week Four Exercises

Complete the following exercises from Introductory Chemistry:

· Exercise 119 in Ch. 13

· Exercise 110 in Ch. 14

· Exercise 90 & 76 in Ch. 15

· Exercise 95 & 98 in Ch. 16