Welcome back. In the last video we talked about how we can name different archonols and specifically we could go into the example of FNO. And the reason why I gave a specific example of FNO was because we were discussing FNO in greater detail in this video. So I go over the actual Slurberstop point. It says describe the dehydration of FNO to ETHLEEN and identify the need for catalysts in the process and the catalyst used. It kind of has two steps Slurberstop point. First it says describe the use, describe the dehydration of FNO to ETHLEEN and also identify the need for catalysts in the process and the catalyst used. So we'll describe the dehydration of FNO to ETHLEEN first. Here we have the chemical structure of FNO. Remember the difference between FNO and ETHLEEN was simply that OH group here. So we have an OH group which ETHLEEN does not have. But if we have a catalyst and high temperatures. So we need to have high temperatures and catalysts which in this case is concentrated sulfuric acid. And we go from FNO to ETHLEEN which is this here. And if anyone watched some of the earlier ones the reason why we need FNO is because we can make plastics out of FNO. But also important that when we go from FNO to ETHLEEN we also lose a water molecule. So this word dehydration refers to the removal of water. So to go to from FNO to ETHLEEN. So from FNO to ETHLEEN we have to have a dehydration reaction which means we lose a water molecule. And then this double bond forms in. So here double bond and the FNO did not have a double bond. Now it also says identify a need for a catalyst in this process and the catalyst used. So catalyst is sulfuric acid. So fioric acid. And the reason why we need to have a catalyst is by itself ethanol does not turn into ETHLEEN. There has to be the conditions have to be right. Ethanol to turn to ETHLEEN. And that requires a catalyst. So identify a need for a catalyst used. We need to have that catalyst because otherwise the reaction wouldn't go ahead by itself. And here down here I've got the chemical equation C2H5OH. This was ethanol. The chemical equation for FNO. And in the presence of the concentrates of fioric acid which is this part here. Ethanol will turn into ETHLEEN and also that water molecule. So this is the ETHLEEN here. And here's a water molecule. So water here. And also important is the fact that here it says gas here. So usually ethanol is actually liquid but because of those high temperatures we've made it into the gas form. Which is important because if it weren't in the gas form it wouldn't actually go from ethanol into ETHLEEN. So describe the dehydration of ethanol to ETHLEEN. We have an ethanol molecule here. In the presence of this catalyst so fioric acid it also has to be concentrated. So concentrated so fioric acid. We go from ethanol into ETHLEEN. And there's a dehydration reaction which means we lose a water molecule. The chemical equation is C2H5OH which is gas. In the presence of that concentrated sulfuric acid turns into ETHLEEN and water. So that was describing the dehydration reaction. And the catalyst use is concentrated sulfuric acid. And the reason why we need to have that catalyst is because if without the catalyst catalyst is some of the speed up erection. So catalyst speed up erection. And without the catalyst the actual reaction wouldn't go ahead. Speed up reaction. Yes I hope that was useful.