1.1 What is Chemistry?

21.6. References http://www.ck12.org

22.4 References

1. Joy Sheng. CK-12 Foundation. CC BY-NC 3.0


2. Hana Zavadska and Zachary Wilson. CK-12 Foundation. CC BY-NC 3.0


3. Joy Sheng, using data from http://en.wikipedia.org/wiki/PH_indicator. CK-12 Foundation. CC BY-NC 3.0


4. User:Datamax/Wikimedia Commons. http://commons.wikimedia.org/wiki/File:PH_Meter.jpg. Public Do-
   main


5. User:Midnightcomm/Wikimedia Commons. http://commons.wikimedia.org/wiki/File:Antacid-L478.jpg. CC
   BY 2.5


6. Image copyright i4lcocl2, 2014. http://www.shutterstock.com. Used under license from Shutterstock.com


7. Zachary Wilson. CK-12 Foundation. CC BY-NC 3.0


8. Laura Guerin. CK-12 Foundation. CC BY-NC 3.0


9. Laura Guerin. CK-12 Foundation. CC BY-NC 3.0