Wednesday, November 30, 2011

Magnesium Lab

We did a short little magnesium lab in our class, and or little experiment actually didn't turn out the way it was supposed to. It didn't really smoke and light up like some other peoples did. But when we did do it we had a little ceramic Crucible, a ribbon of magnesium, a scale, and a little gas torch that heated up and turned the magnesium into the powder that we got at the end of the lab.
   First we got the ceramic crucible and weighed it by its self and got 11.61g. Next we weighed the Mg ribbon and crucible before heating it and got 12.01g. Then we subtracted 11.61 from 12.01 and got .60g for the weight of the Mg ribbon. We next weighed the crucible and Mg products after heating and got 12.17g. The Mg ribbon products mixed with distilled water was .16g. After we weighed that we got a conductivity tester and tested the conductivity of the Magnesium. The Mg had a medium conductivity level. The compounds were ionic.

Here is a pictures of burning magnesium ribbon:

Magnesium ashes after being burnt:

What we did was pretty similar to this, except we burnt the Mg ribbon in a crucible.

Monday, November 14, 2011

Conductivity Lab

We did a conductivity lab and tested different substances mixed with water. We had conductivity testers that consisted of batteries, wires, and led lights that showed us whether the substance was reactive or not.  We tested 5 different substances: Sodium bicarbonate, Sodium acetate, Corn syrup, Corn starch, and molasses. Mostly all of them were all 3s which were the highest reactive level, and only one of them was a lower level. (about a 2.5).  Sodium bicarbonate and Sodium acetate were high, because they have a lot of ions in them with the either the sodium, bicarbonate, or acetate. The corn syrup and molasses have higher, thicker sugars, and the sugar molecules must be bigger, making the substance more reactive.