Chemistry (2009/2010)

Naming Compounds Flow Chart

Click Here to see a related example for classifying shapes

The purpose of this exercise to work on getting more comfortable naming ionic and covalent compounds.

In order to accurately name a compound, you need to be able to determine a number of aspects of that compound and a flow chart is a great way to do that.

Here's what you need to do:

  1. Given a chemical formula for a compound, you should be able to determine the appropriate name for that compound.  The process involves a number of steps (all or most of which you already know, you just haven't written them down)
  2. The first step is to determine whether the compound is either covalent or ionic. Therefore your first step is to come up with a yes/no question to determine whether the compound is ionic or covalent. 
  3. A "yes" answer branches you to questions that further identify the full chemical name of an ionic compound
  4. A "no" answer branches you to questions that further identify the full chemical name of a covalent compound.
  5. Start with CO2 and NaCl as test cases. 
    • By asking a series of yes/ no questions, you should determine that the name of the first compound is "carbon dioxide"
    • By asking a series of yes/ no questions, you should determine that the name of the second compound is "sodium chloride"

    • You should assume that your reader (that would be me) knows the names of the atoms but does not know how to name ions (your chart should do that).

    • If you do try including polyatomic ions, assume that your reader (me again) does know the name of the poly atomic ion.  In other words, you do not need to put in branches for naming sulfate or sulfite or nitrate or nitrate or any other polyatomic ion.

  6. I will try your flow chart using two mystery compounds, one ionic and one covalent, to be successful, your chart should take me right to the appropriate naming strategy.
  7. I'll give you an extra point if you successfully treat poly atomic ions as well (it will be something simple like LiNO3, not something exotic like acetate or benzoate)

HINT: Break down the steps that you use in your mind when you are naming a compound.

  • If you see MgF2, what steps do you work through to determine that the name is magnesium fluoride, for example, why is it magnesium fluoride and not magnesium difluoride? (because it is an ionic compound, that's why)

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MISCONCEPTION ALERT!

Only concern yourself with compounds we've learned about:

  • simple covalent compounds
  • ionic compounds
  • ionic compounds containing polyatomic ions (extra credit)

DO NOT WORRY ABOUT polar bonds, acids or any other items we haven't talked about

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IF YOU ARE STILL STUCK, try going to my homework forum on my website and posting a question. 

  1. Go to my main homepage
  2. Click on the Homework option under MENU
  3. Log in to the district MOODLE site using your school ID
  4. Select Mr W Pd 2 chem
  5. Choose the flow chart problem
  6. Post a question

OR

Or problem solve, what do you do when you're stuck?  How do you try to find an answer to a difficult problem?

Hopefully you didn't wait until late on Tuesday to start a project you didn't understand.  Please drop by and see me anytime on Tuesday

OR

email me *before* 7:00 PM on Tuesday and I'll send you a big hint, but it will cost you a point.

PLEASE PLEASE PLEASE don't send me an email at 11:00 saying you really tried but failed.  It's it's 11:00 o'clock on Tuesday and you are starting to panic, realize that I never give you assignments you can't do.  Work it out, make it happen, research.

   
Naming Compounds Flow Chart Rubric
Item
Nada - Zilch - Ixnay
Meets Standard
Exceeds Standard
Covalent Bonds

Fails on more than one question

(0 - 1 pt)

Fails on only one question

(2 pts)

Doesn't fail on any question

(3 pts)

Ionic Bonds

Fails on two or more questions

(0 - 1 pt)

Fails on only one question

(2 pts)

Doesn't fail on any question

(3 pts)

Polyatomic Ions
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extra credit
Format

haphazard and/or poor planning and/or poor execution

(0 pt)

Execution shows some attention to detail but some areas are unclear.

(1 pt)

Attention to detail is clear and obvious

(2 pts)

Legibility/Organization
Handwritten with scratched out areas

Handwritten or typed with errors, ommissions or some areas are hard to follow

(1 pt)

Typed without errors, clear and easy to read

((2 pts)

This isn't an exact analogy but it's close.