Sunday, February 6, 2011

Lab 5 B

Today we did a great lab in class:

There were 7 reactions that we observed and each one was amazing!

Here they are:

Reaction 1: We held a piece of copper wire in the hottest part of a bunsen burner flame for several minutes and recorded our observations:

Reaction 2: We took a nail, and cleaned it, then we submerged half the nail in liquid copper (II) sulfate solution. 15 minutes later, the part of the nail that was submerged was coated with copper.

Reaction 3: We heated some copper (II) sulfate(s) as we have already done(we are experts) and dried it out completely. It turned greyish,blue and was grainy and dry

Reaction 4: We added water to the anhydrous salt! Remember what happens:??? You get the hydrate back.

Reaction 5: We took 2 test tubes, one contained CaCl2(l) and the other Na2CO3(l) and we poured the calcium chloride into the sodium carbonate.

Reaction 6: We took mossy, fuzzy zinc and submerged it in hydrochloric acid.

Reaction 7: Manganese (IV) oxide is added to hydrogen peroxide. We tested the gas by placing a burning splint into the test tube. It lit up!

http://www.youtube.com/watch?v=ARRCD_Ry4eI  #1
http://www.youtube.com/watch?v=oQz5YEsx7Fo #6

Sorry we couldn't find them all!

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