why did we glue our bycycle and car red plastic?
The basics are what just about every person uses; computers, cell phones / blackberries / etc. (for texting), texting, e-mail, Skype (or other video chatting programs). A couple deaf related technologies are closed captioned TV (although it's built into every TV now, so it's not exactly a separate tech) and video phones.
Before the demonstration, the alkalai metals need to be stored under mineral oil to keep them away from moisture and oxygen. Alkalai metals react very violently with water and oxygen. Most alkalai metal demos involve putting the metal in water, so I'll assume that's what's going to happen in this case. When placed in water, alkalai metals either explode or fizz violently, generating a lot of heat (often catching fire). Thus, only a small amount (just the tip of a spatula) of the metal should be added to the water so the reaction isn't too violent. The observers should be a safe distance away (at least six feet) from the reaction so they aren't burned. They should also possibly be wearing safety goggles just incase. The demonstrator should be wearing a labcoat and safety goggles for obvious reasons. Also, since alkalai metals corrode the skin, gloves should be worn. When placing the alkalai metal in the water, make sure the water only fills the beaker by about 1/4 (if the water level is too high, it can splash or spurt out the beaker). Use a dry spatula or forceps to pick up the metal (if it's wet, the metal will start reacting before it even enters the beaker). Hold it at arms length and tap gently on the side of the beaker until the metal drops in. Take a step back as the reaction starts. Once the reaction is complete, place the spatula or foreceps into the water to make sure any metal residue on them is reacted. The solution in the beaker is the metal hydroxide and will be corrosive and probably quite hot from the reaction. Allow it to cool, then pour down the sink, washing away with plenty of water.
That is so mean! I like squirrels- they're cute.
