Question

question 5.3.6 use the five lighting the bunsen burner with a first lighter instructions above to fill in the blanks. do not enter punctuation. a. pull the safety lighter away from the bunsen burner as soon as the bunsen burner ignites. b. with the air regulation ports nearly closed, the flame should be a yellow flame. safety consideration - adjusting and using the flame after lighting, the initial flame will be a yellow safety flame which should never be used for heating. use the gas regulation needle valve and the air intake collar to adjust the flame. 1. opening the gas regulation needle valve will increase the height of the flame above the top of the bunsen burner. 2. adjusting the air intake collar to open the air regulation ports will create a flame with the inner and outer cones shown in figure 4.3.2. 3. the tip of the inner cone should be used for heating. this is the hottest part of the flame with a temperature of about 1550°c. 4. never reach over a lit bunsen burner. 5. never leave a lit bunsen burner unattended.

Explanation:

The answers are directly taken from the given Bunsen - burner lighting and safety instructions. For part a, the text states to pull the safety lighter away from the Bunsen burner when it ignites. For part b, it says with air - regulation ports nearly closed, the flame should be yellow.

Answer:

a. safety lighter, Bunsen burner
b. closed, yellow