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March 26, 2017

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1.How would you separate a mixture of salt, sawdust, and iron filings?

2. The Mg^2+ and Na^+ ions have ten electrons. Which has the smaller radius? Explain.

  • chemistry - ,

    From my high school chemistry class almost 60 years ago --
    Use a magnet to pull out the iron filings. Water will dissolve the salt. The sawdust will remain.

  • chemistry - ,

    Ms. Sue remembers her chemistry from 60 years ago. Yea!

    For #2,consider the charge on the Na nucleus versus the charge on the Mg nucleus.

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