Some strategies for memorization: QUESTION: Which of the following polyatomic ions is not paired with its correct formula? A. nitrate, NO33-, B. borate, BO33- C. carbonate, CO32-, D. chlorate, ClO3- Borate is BO33- Names and formulas of polyatomic ions are trivial information --- just memorize. Some strategies for memorization: Read the names formulas aloud several times. Make up memory aids; find patterns. Work on drills (reading/writing formulas of compounds). Use it or lose it! SCRIPT: Which of the following polyatomic ions is not paired with its correct formula? Nitrate,… borate… carbonate… or chlorate PAUSE CLICK Names and formulas of polyatomic ions are trivial information. In other words, you just need to memorize them as part of the basic vocabulary of Chemistry. Whether or not your teacher requires you to memorize them, it’s a good idea to just memorize them. CLICK Here are some strategies that you can use for memorization. CLICK Refer to a list of names and formulas. Read the names formulas aloud several times. Hearing and seeing should help you remember better than just seeing. Make up memory aids. Try to find patterns in the names and formulas. Work on drills, such as reading or writing of formulas of compounds, that require you to remember these information. Remember that if you don’t use this information, you’re likely to forget it. CONTINUED ON NEXT SLIDE

Memory aid: Oxoanions with 3 oxygen atoms, “ate” BO33-: borate CO32-: carbonate SiO32-: silicate NO3-: nitrate ClO3-: chlorate BrO3-: bromate IO3-: iodate Here’s an example of a memory aid to remember oxoanions that have 3 oxygen atoms, with names ending in “ate” The most common ones you’ll encounter are CLICK Borate, which has a charge of -3 CLICK CLICK Carbonate and silicate, which both a charge of –2 And CLICK CLICK CLICK CLICK Nitrate, chlorate, bromate, and iodate Let’s try to locate the elements boron, carbon, silicon, nitrogen, chlorine, bromine and iodine in the periodic table to see if we can find a pattern that might be easy to remember. CLICK Here’s boron… CLICK borate has a charge of –3 Here’s carbon And silicon CLICK … carbonate and silicate both have a charge of –2 Here’s nitrogen CLICK chlorine CLICK bromine And Iodine …. Nitrate, chlorate, bromate, and iodate all have a –1 charge. CLICK PAUSE END RECORDING

Video ID: 1-22-2 © 2008, Project VALUE (Video Assessment Library for Undergraduate Education), Department of Physical Sciences Nicholls State University Author: Glenn V. Lo Narrator: Funded by Louisiana Board of Regents Contract No. LA-DL-SELECT-13-07/08