1. By Serena, Lydia Block: B

2. Introduction Alkaline dry cell(alkaline battery): a type of dry cell dependent upon the reaction between zinc and manganese dioxide (Zn/MnO 2 ). The origination of its name: the electrolyte(KOH) is alkaline its non-fluid electrolyte

3. The half-reaction are: Anode: Zn (s) + 2OH − (aq) → ZnO (s) + H 2 O (l) + 2e − Cathode: 2MnO 2(s) + H 2 O (l) + 2e − → Mn 2 O 3(s) + 2OH − (aq)

4. In the earth 80% of manufactured batteries in the US 46% of all primary battery sales in Japan 68% of all battery sales in Switzerland 60% of all battery sales in the UK 47% of all battery sales in the EU 20% of all battery sales in China

5. Product Common battery A rechargeable battery Detector

6. Common used toys (robots and cars ) remotes wall clocks other light duty household items radios photo-flash applications watches high-drain applications camera Interphone Razor Alarm Calculator Hearing aids … The best choice for your gadget!!!

7. Advantages of an Alkaline Battery Chemical Composition  Electrolyte: a basic KOH paste(alkaline electrolyte)  Anode : zinc powder provides greater surface area

8. Advantages of an Alkaline Battery Capacity  The use of an alkaline compound more energy.  Produce 500-700 percent more power

9. Advantages of an Alkaline Battery Shelf Life  No voltage drop  Ability to store for a long period of time.  10 times longer than common dry cell.

10. Advantages of an Alkaline Battery Performance in Different Environments  Ability to be used in different temperatures.  Common dry cell: 0 to 160 degrees  Alkaline Battery: as low as -20 degrees

11. Disadvantages of an Alkaline Battery Cost  More expensive than common dry cell

12. How to recognize the carbon-zinc battery and alkaline battery in your daily life? Appearance (more beautiful and better design) Touch (notch on the bottom) Weight (alkaline battery 23g ; carbon-zinc battery 15g) Sign (AR; LR)

13. References Life Cycle Impacts of Alkaline Batteries with a Focus on End-of-Life - EBPA-EU Monthly battery sales statistics - MoETI - March 2011 ^^ INOBAT 2008 statistics. Battery Waste Management - 2006 DEFRA EPBA statistics – 2000 http://www.powerstream.com/BatteryFAQ.html http://www.ehow.com/info_12070433_alkaline-dry-cell-vs-ordinary-dry-cell.html http://www.ehow.com/facts_7719453_alkaline-vs-regular-battery.html http://www.ehow.com/info_8297163_difference-between-alkaline-nonalkaline- batteries.html http://www.ehow.com/info_8297163_difference-between-alkaline-nonalkaline- batteries.html http://www.odec.ca/projects/2006/glaz6j2/battery_info.htm#diagram http://www.wisegeek.com/what-is-a-dry-cell-battery.htm http://dict.battery.com.cn/detail_177.html http://en.wikipedia.org/wiki/Alkaline_battery?vm=r

14. Homework P232 #55 Thank you for your listening!