Methyl

Question: How does methyl mercury effect the human body? Methyl mercury has been found in fish and such seafood creatures that live near the shore. Some of those fish end up in stores and other places where we eat them. I was wondering what effects it could have on people when we digest that methyl mercury.

Answer: It's the same type of effects as if you have ingested mercury yourself: it results in neurological damage and even death. However, you have to eat a lot of it to really feel the effects (more than 12 oz a week and you're putting yourself at risk--unless you're eating imported seafood or have exposure to mercury from other sources, then your risk is even HIGHER). Pregnant women should not eat tuna, by the way. And imported tuna has levels higher than federal standards. For levels of mercury in different fish, check out this website: http://www.gotmercury.org/

Question: Why the methyl orange has to be eluted with sodium bicarbonate (a basic solution) and not with an acid one? Why the methyl orange has to be eluted with sodium bicarbonate (a basic solution) and not with an acid one? If anyone could help me. Thanks.

Answer: Methyl orange is itself a weak acid which is neutralized by eluting with any basic solution such as sodium carbonate. Adding another acid to the methyl orange would leave its color more or less unchanged. Adding the base would change the methyl orange to a pale yellow.

Question: What colour will methyl orange changes to when it is in a alkali solution? I was studying for my chemistry test on acids and bases. I was revising when I came across indicators for acids and alkalis. It stated in my textbook that when methyl orange is in alkali solution, it becomes yellow. In one of my chemistry revision guide, it stated that it will become blue..? Both are very different colours, so which one is the correct one???

Answer: According to my text book Methyl Orange is red in colour on acidic side and yellow colour on basic side I guess, just write what the textbook says in your test, and if the teacher marks you wrong you can use your textbook and prove it to him/her

Question: How long does it take to die from Methyl mercury poisoning? For a school report, how long does it take to die from how much methyl mercury?

Answer: Seems that mercury is something that builds in your system after years and years.

Question: How do you make methyl alcohol from methane gas? I know that rotting vegetation under water produces methane gas. But, how do you then get methyl alcohol from this? What I am trying to do is figure out a way to make methanol from grass clippings. It has been done with other vegetation.

Answer: Methane comes from rotting vegetation as a result of bacterial action. To put it simply, the bacteria eats the plants, then farts. There's an industrial process for converting methane to methanol, by reacting it with steam to get carbon monozide, then with hydrogen to get methanol, but the methane used here is from petroleum sources ("natural gas"). They use tons of it, and it needs high pressures/temperatures that you wouldn't want to reproduce at home. Check out http://en.wikipedia.org/wiki/Methanol An older way to produce methanol is the destructive distillation of wood: you heat the wood in the absence of air, and a cruddy oil comes off. Redistillation of this separates the methanol (and that's why it was known as "wood alcohol"). Grass might work. A grand-uncle of mine used to do this, with some make-shift still (what he was after, actually, was the charcoal left behind, but he collected the distillate as well to use as a crude lamp-fuel). Unfortunately, he's dead, so I can't ask him for details.

Question: What colour does Methyl Orange turn in a base? How about in an acid? In my understanding, methyl orange turns yellow in a base and stays orange in an acid. But I've had sources say that methyl orange will turn blue in a base and pink in an acid?

Answer: Methyl orange Methyl orange is one of the indicators commonly used in titrations. In an alkaline solution, methyl orange is yellow.Now, you might think that when you add an acid, the hydrogen ion would be picked up by the negatively charged oxygen. That's the obvious place for it to go. Not so! In fact, the hydrogen ion attaches to one of the nitrogens in the nitrogen-nitrogen double bond to give a structure. In the methyl orange case, the half-way stage where the mixture of red and yellow produces an orange colour happens at pH 3.7 - nowhere near neutral.

Question: What is the molarity of this methyl red solution? I have a solution that is 500 ml of a 0.1% methyl red aqueous solution. The 0.1% of methyl red is mass/volume. How many grams of methyl red do I have in this solution?

Answer: 500ml = 0.5L 0.1% = 0.1 / 100 = mass(gram) / volume(L) So, Mass is equal 0.1 grams when the volume 100 liters If the volume is 0.5 liters, the mass is equal 0.0005 grams.

Question: What results can a woman expect using Methyl Ripped Hardcore? I, a guy, have used Methyl Ripped Hardcore with great results and would recommend it to any other guy. However, I have a female friend who would like to use it but is hesitant to do so. She would like to know what results other women have experienced while using the product and would like to see before and after photos.

Answer: tell her to use hydroxycut hardcore instead to get lean

Question: What is the differene between Ethyl and Methyl when it comes to Adhesive base? in instant adhesives, there are 2 bases that are used which are; Ethyl and Methyl. Could anyone explain why they have 2types and what the difference is bewteen the two? thx.

Answer: There are actually four bases for these cyanoacrylate adhesives. Ethyl, Methyl, Butyl and Octyl. Ethyl: http://www.answers.com/topic/ethyl-cyanoacrylate Mthyl: http://www.answers.com/topic/methyl-cyanoacrylate Butyl: http://www.answers.com/topic/butyl-cyanoacrylate Octyl: http://www.answers.com/topic/octyl-cyanoacrylate It appears to be related to the type of application. Example: Octyl cyanoacrylate is used in the medical field in place of stiches.

Question: How many isomers can be drawn from 2 methyl spiropentane? I really want to know whether the central carbon of the 2 methyl spiropentane can rotate, ie if there is a rigid structure.

Answer: There are 2 enantiomers - that is all. The central C atom is fixed and rigid.

Question: Why does methyl chloride become a liquid with little cooling while methane stays a liquid? Both methane and methyl chloride are gases at room temperature and standard pressure. Methyl chloride, however, becomes a liquid with only a little cooling or a moderate pressure. How can this be explained on the basis of the relative polarities of the two molecules?

Answer: while methane stays a LIQUID ???????????? This must be a high school question. with only a little cooling? little ?? compared to what? high school - amateur teacher? Student teacher? Arts & Crafts teacher subbing for real Science teacher? is there some importance about "room temperature" in terms of chemical concepts? high school. BP methyl chloride -24C BP methane -162C

Question: Why the hydrolysis of methyl salicylate has to be under reflux? I have a question showing how salicylic acid is made. And asking what would happen on the first step, if the methyl salicylate was hydrolised ( using NaOH cataylst) but it NOT being under reflux. Under reflux, the products made are sodium salycylate and an alcohol.

Answer: Reflux speeds up the reaction in two ways. First, the methyl salicylate will be more soluble in hot water to react with the NaOH; second, the reaction is faster at higher temperatures because of the Arrhenius relation k = Ae^(-Ea/RT). All you need to know about this equation is k is proportional to the rate of reaction, and increasing T (temperature) increases k. The overall point is, the reaction will proceed without reflux, but it might take a day or two; but if it is refluxed, it should be finished in an hour or so.

Question: Why can you use either methyl red or phenolphthalein as an indicator when pH=7? In an acid-base titration, you are supposed to use methyl red as an indicator when the pH is roughly 5, and phenolphthalein when pH is roughly 9. So why can you use either one you want when pH is 7? I know that when pH is 7 the reaction has neutralized, but is that why? Can someone elaborate? Thanks.

Answer: You can't. If you're titrating a weak acid, the indicator pKa must be higher than the acid pKa, otherwise the indicator will change color before all the acid has been neutralized. Once the equivalence point has been reached, pH rises rapidly with additional base, so the indicator will rapidly change color. If you use a pKa 8 indicator, you'll slightly overestimate the concentration. If you use a pKa 5 indicator, you'll underestimate the pH by 2 pH units. m

Question: Can i use an unknown concentration of lactic acid to standardize with 0.1M NaOH using methyl red? Will i have an error in calculation if i insisted of using methyl red instead of phenolphthalein? After all, lactic acid is a weak base.

Answer: Not a good idea. Methyl red changes color in the acid range. You want an indicator that changes color in the pH 8-9 range, near the equivalence point for lactic acid titrated with NaOH.

Question: What does 1 isopropyl 3 methyl cyclohexane look like? I know what the 3 methyl cyclohexane looks like. I guess what I'm having trouble with is the isopropyl. Does it attach at the inside or outside carbon? Does that make sense? Probably not. . . If you know anything, please help.

Answer: ok draw your methyl cyclohexane then say the carbon on the ring that the methyl is on is carbon #1, count clockwise or anticlockwise to #3 carbon and draw a Y on that carbon on the ring..the isopropyl and methyl groups should be sticking out of the ring..hard to describe..if u dont know how isopropyl looks, it's like a Y sticking out on the cyclohexane

Question: What's the typical mix for a methyl violet solution? I know methyl violet is water soluble, but is it typical to mix it with water or some alcohol for use in lab? What's the typical concentration? I forgot to add, this is Methyl Violet 2B (using as a pH indicator)

Answer: One learns every day. I spent about 40 years of my life selling methyl violet as a dyestuff to the paper industry and I did not know that it was a pH indicator. Now I know. Methyl violet 2B (simply called methyl violet) is used in chemistry as a pH indicator to test pH ranges from 0 to 1.6. At the acid end of its measuring range, it takes on a yellow color. At the upper pH end, it becomes bluish-violet. The methyl violet crystals are reasonably soluble in water, about 2.5 - 3%, and more soluble about 12 - 15% in ethanol. Methyl violet is an extremely strong colourant and I am sure that the 2.5% solution in water ( or even much less ) will be adequate for your use. Please note: There are many ready made liquid solutions (50% solutions) of methyl violet on the market, because industry no longer uses the powder grades. Be careful with the liquids because they are dissolved using ethanoic acid and possibly glycols, which will interfere with your analytical work.