In a message dated 00-01-13 16:42:31 EST, you write: > But, earlier someone said that if you > had > water in the fuel, and you added alcohol to the tank, the noticeable level > below > the fuel would raise, looking as though the water had increased, but in > reality > you would be seeing the alcohol/water solution. Now, either you can see it, > or > you can't. Which is it? > That was a description of the test for alcohol in the fuel. You take a modest amount of fuel/alcohol from the pump at the gas station and put it in the presencxe of an equal (or similar) amount of water. The relatively high concentration of alcohol in the gas will decrease as the alcohol really wants to be with the water, not the fuel. The relative amount of "water" will appear to increase, indicating the presence of alcohol in the fuel.
For example, if you start with 100 ml of fuel which is 15% alcohol (85 ml of gas and 15 ml of alcohol and add it to 100 ml of water, you'll end up with something like 110 ml of "water" which is now really about 98 ml of pure water and 12 ml of alcohol, and 90 ml of "fuel" which is really 85 ml of pure gas, 3 ml of alcohol and 2 ml of water all in solution. (I made up the numbers, but the gemeral trend is correct.) The point is that if you put water in a beaker and mark its level, then add the fuel in question, the line between the two will be above the mark if there's a measurable amount of alcohol in the fuel. If you add a small amount of water (a ml or 2) to a lot of gas with 15% alcohol, the water will be absorbed into solution and that's the dry gas effect. Read chapter 4. There'll be a quiz on monday. John --------------------------------- to unsubscribe send mailto:[EMAIL PROTECTED] _____________________________________________________________ Check out the new and improved Topica site! http://www.topica.com/t/13
<<attachment: winmail.dat>>
