Empirical Formulas

The lesson about Empirical formulas was simple but the problems were difficult. Empirical formulas seem hard at first but are actually quite simple. It is just the molecular formula reduced to as small as it can go. You can also find the empirical formula using mass or percentage of an element.

https://www.chem.tamu.edu/class/majors/tutorialnotefiles/emp2c.gif

Chloride Lab

We did a Chloride Lab with empirical formulas. This was generally a very easy and slightly boring lab. We sat and watched acid boil for most of the lab and it was not as great as I thought the lab would be. It also smelled very bad afterwards.

It was just mass of the beaker, beaker plus zinc, and beaker plus acid and zinc. Pretty simple stuff.

Chemical Composition Test Reflection

This test was the worst test of my life. I have no doubt that I failed this test. My more intelligent friends were telling me it was hard so for me it was impossible. For most of the math questions I had no idea what I was doing. 10/10 Best test of all time. I hope I can save my grade. 

http://www.wallpaperfly.com/thumbnails/detail/20120628/meme%20sad%20crying%20white%20background%201920x1200%20wallpaper_www.wallmay.com_10.jpg

Hydrated Compounds

The Hydrated compounds all have a water molecule in the formula. This contributes to the crystalline structure. Anhydrides must be hydrated first before they can become an anhydride. 

https://upload.wikimedia.org/wikipedia/commons/4/4b/Cobalt(II)_chloride.jpg

Molar Mass

In class we took about molar mass. Molar mass is the mass in grams of 1 mole of a substance. Basically converting the number of moles into mass in grams, or grams to moles.

http://getchemistryhelp.com/wp-content/uploads/2013/05/ChemistryLessonMolarMass.jpg

Chemical Composition Pre-test

This was by far the most impossible pre-test we have taken all year. I knew about 3 of the answers probably less actually. I had no idea what I was doing. I didn't know you could know the number of molecules in an element when given the mass the mass. This is probably going to be the lowest grade I have ever gotten.