[XxFrogg3rxX]

Hello, after reading the rules. I would just like to to learn how to know if a compound is insoluble in water and how do you know if it is an ionic compound.

[billnotgatez]

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[Arkcon]

OK.  Lets see how you name one.  Start with the first one.  What do you think it is? 

[Ben Bob2]

Here are the rules for determining solubility:
http://chemistry.about.com/od/solutionsmixtures/a/solubility-rules.htm

And here's everything you need to know about determining if a compound is ionic:
http://en.wikipedia.org/wiki/Ionic_compound

[Ryumexicano]

Teachers usually give you a "solubility" table, from which you can figure out what is soluble and what is not.  You also get to do this at the lab, where it is more fun.  Naming compounds is a MUST or a lot of your chemistry classes at the college level, so be sure to master that and also master lewis structures.

Naming compounds is just a system that you have to memorize and practice.