 Now I'm going to show you how to safely use a Bunsen burner in the lab So if you notice this is what a Bunsen burner would look like. This is what you'll see when you go to the lab So this is a Bunsen burner and it's attached to the rubber tubing this rubber tubing Actually attaches to a gas outlet right here So it's important for you to know How the gas outlet functions? So right now the gas outlet is actually in the off position And you know this because the gas handle right here, which is a part of the outlet It is perpendicular to the nozzle right here. That's how you know that the gas is in the off position So in order for you to use a Bunsen burner you have to make sure that you turn the gas Handle to the on position in that case. It will be perpendicular to the gas nozzle right here so Before we actually use a Bunsen burner We're going to use this to light the Bunsen burner, which is called a striker So you want to practice using the striker so that you know definitely it will ignite the gas Fumes as it comes out of the Bunsen burner. So you want to forcefully move the The striker so that it ignites against this gasket here So you want to move it so that you see sparks That's how you know the striker is working So I'm going to light my Bunsen burner now. I'm going to attach the tubing Firmly to the outlet another thing you need to look at you need to observe your tubing to make sure it doesn't have any leaks Or any cracks. So let me just do that So you're looking at your tubing to make sure there are no cracks and there are none so we're going to attach the Bunsen burner back onto the gas outlet and What you want to do is to turn the gas handle Until you hear the sound of gas coming out of the Bunsen burner So you don't want to turn it all the way on Because you want to protect yourself from being burnt So I hear the gas coming out of the Bunsen burner So I'm going to now light the Bunsen burner and If you notice you have your nice blue flame, which is what you want to see So when you're actually using the Bunsen burner, let's say you're heating up a Substance as part of your experiment You want to make sure that the test tube is held away from you so that any fumes That possibly could be escaping through the hole in the test tube. You would not directly get affected by this So when you're finished heating Note that your test tube is hot. So you need to hold it with a test tube holder You're going to put it securely away in the test tube rack here So you put it away so that nobody can Touch it and as a result get burned and then you're going to turn off your Bunsen burner by switching it to the off position which is perpendicular to the gas nozzle and then you Remove the tubing from the gas outlet and that is how you use your Bunsen burner