OMG LAB 5B SEW KEWL!

Today, we completed Lab 5B - Types of Chemical Reactions. We were able to observe synthesis, decomposition, single replacement, and double replacement in action!

First thing's first! SAFETY: ALWAYS MAKE SURE YOU HAVE ON YOUR LAB APRON AND SAFETY GOGGLES. Don't wanna corrode those eyes!

Then you may begin with the reactions... I will sum them up.

Reaction 1: This involves burning copper wire with a bunsen burner. Using crucible tongs, hold the wire over the hottest part of the flame. The copper will begin to change colours.

For those who were unable to observe this in class:



Reaction 2: This involves placing a shiny nail in copper(II)sulphate. This is an example of SINGLE REPLACEMENT, ladies and gentlemen. The magic is that 15 minutes later, the part of the nail that was submerged under the copper(II)sulphate will be coated with copper! Cooooolio :)

Reaction 3: Heating some copper(II)sulphate. Ooohhhhh do I remember heating a HYDRATE from Lab 4C? Kekekeke... So what happens when the water is heated and evaporated?


Reaction 4: What happens when water is added back into the now anhydrous copper(II)sulphate?

This website explains Reactions 3 and 4 very well: http://spot.pcc.edu/~gbackes/CH222/Labs222.W05/Exp.10.Hydrates.htm

Reaction 5: Pour calcium chloride solution into a sodium carbonate solution.

Here is a video, this uses sodium BICARBONATE




Reaction 6: Mossy zinc is covered by hydrochloric acid!

Here is a video if you missed it!




Reaction 7: Manganese(IV)oxide is added to hydrogen peroxide solution. Then, the gas is tested by placing a glowing splint into the mouth of the test tube - the gas should cause the test tube to light up even brighter!


Here is a video, seemingly exaggerated. Because this definitely DID NOT happen in class today.



After you have finished, WASH YOUR HANDS! You'd be a fool if you didn't.