Chemistry 4-7-14 Molecular Geometry

CHEMISTRY: Hey guys, great job adding the last step to Lewis structures – molecular geometry! Who knew we’d be doing geometry in chemistry?!?

Advice for Lewis structures – don’t forget to count the electrons! And then double check the number of electrons. And when you think it’s right, count the electrons!! 🙂

Advice for molecular geometry? Make sure you know how to draw Lewis structures, then determine the type of ABE structure and you’ve got it. Easy-peazy!

CHEMISTRY 4-7-14 Molecular Geometry from Tammy Skinner on Vimeo.

Chemistry: Water Wire Lab

UPDATE – The due date has been changed to midnight on Friday, April 25. You’ll write this one up (with photos, data table, etc.) and save it as a PDF in you Google Dropbox.

CHEMISTRY – Here’s special info about the Water Wire Take Home Lab. It may work the first time you make your apparatus and it may not, so give yourself plenty of time. I’m looking forward to hearing about the way you will keep experimenting with ideas to see how to make those light bulbs light up! Do you know, that’s when you often learn the most and grow the strongest – from failure?!

Also, give yourself plenty of time to get your supplies – super important!! You will need to get the light bulb from some place like Radio Shack – that’s the only local place I have found them. Be sure and get your bulb early in case they run out, and you might want to consider an option just in case you blow your light bulb – buy two maybe? One word of advice – try it first with a smaller voltage battery than the 9V battery suggested on the sheets. Last year, we found that the 9V batteries kept blowing the light bulbs. You might also consider getting a light bulb with a higher voltage, but I can’t promise how it will work – especially on the weaker electrolyte solutions.

You’ll also need popsicle sticks and I have skinny popsicle sticks that will work really well, if you’d like to use them.

Don’t forget to also do the last part of the lab – to test five different liquids at your home to see if they are ionic solutions. You will type up this report and save it to your Google Drive as a PDF. Also, don’t forget to include lab photos for each part. You will include all your results in the Observations section of your lab report. It is due by midnight on Wednesday, April 23. Good luck with it, and have fun!

light bulb