Unit #4 - Solubility Rules Lab

Wednesday, October 31, 2012

HAPPY HALLOWEEN!

There were some great costumes today! Mr. Leiberman had a stellar Captain America costume on!

We started off class by checking in our two homework assignments. If you missed class, need the worksheets, or the answers, make sure to refer back to our Moodle site for all those links!

We spent the second half of class on our Solubility Rules Lab. We mixed six different sodium solutions with eight different nitrate cations to see which reactions would create a precipitate. We looked for "cloudiness" to help determine if a precipitate formed. Just looking at the color change was NOT enough to distinguish a precipitate.

The anions were sodium...

• carbonate
• chloride
• hydroxide
• iodide
• phosphate
• sulfate

The cations were nitrates of...

• aluminium
• potassium
• barium
• calcium
• copper (II)
• iron (III)
• silver
• zinc

It was a quick and organized lab, so we spent the last 10-15 minutes of class working on the post-lab questions. Also, since some people did not know who Captain America is, we watched a trailer of Captain America: The First Avenger.

Remember, the lab is due Friday! Have a great November!

The next scribe will be... Jake Aquino!