Never use your fingers to hold an object in the gas burner
flame. Instead, use a pair of tongs to hold a small, solid object.
If the object is large, use a ring stand and a triangle or wire
gauze to support the object in the flame.
You need to heat a nonflammable liquid in an Erlenmeyer flask. Could you simply hold the flask in the flame with a tongs, or should you set the flask on a wire gauze on a ring stand over the flame? Answer
Set the flask on a wire gauze on a ring stand over the flame.
Holding the flask with tongs is difficult and will probably
result in spilling liquid. In addition, if the flask must be
heated for more than a few minutes, the tongs will become too
hot to handle.
You need to heat a nonflammable liquid in an Erlenmeyer flask. Could you simply hold the flask in the flame with a tongs, or should you set the flask on a wire gauze on a ring stand over the flame? 