Removes solder from electronic components so that they can be removed from the circuit board
Solder will conduct electricity, so is not an insulator.
Sandcloth the end being soldered. Squish the end with pliers so it is tight. Put flux on the end and solder. Easier to buy a copper cap and solder that on!
Solder all the pins connected to the two large plugs, there is about 20 or so connection, just solder them all on the back of board.
If you're looking for treasure, it is not there. However, there are types of solder that have silver in it so there may be traces of silver in the solder joints on your motherboard.
It could be either. Any type of liquid core solder (acid core, rosin core, etc.) is heterogenous, since there's the metal part and the core part. A solid-core solder is probably homogeneous.
with solder
Solder is a mixture of various metals. Its physical property is that it melts at fairly low temperatures, not so low that it melts when this is undesired. Its reactions are the same as the component metals.
Yes, usually no problem. If you know how to solder, then solder away.
In some solder it is. But even if it is in the solder you should still use flux.
Sand paper or steel wool to clean it and flux to clean the oil or other surface contaminants so that the solder will stick.
Solder has a relatively low melting point, and it wets many different metals allowing it to be used to join (solder) them together. It is also fairly resistant to corrosion when the correct solder alloy is applied to the work. We see a lot of solder used in electrical and electrical applications, so it's a fairly good electrical conductor.