tag:blogger.com,1999:blog-4763358098426655968.comments2023-12-19T10:30:46.533-05:00Home ChemistryKathy Cecerihttp://www.blogger.com/profile/18188872992635537080noreply@blogger.comBlogger182125tag:blogger.com,1999:blog-4763358098426655968.post-32199820606010464742015-11-29T20:30:15.438-05:002015-11-29T20:30:15.438-05:00How long does this last once it's made?How long does this last once it's made? Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-65620678368809634192015-09-16T11:33:19.720-04:002015-09-16T11:33:19.720-04:00also works with antacid tablets like Tums, as they...also works with antacid tablets like Tums, as they are mostly calcium carbonate, however, it works faster if you crush them :)<br /><br />(also explains why you burp when you take them!)Magpiehttps://www.blogger.com/profile/04449784990569067527noreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-16134869599210232632015-08-14T09:44:43.907-04:002015-08-14T09:44:43.907-04:00Actually, there are three types of reactions not t...Actually, there are three types of reactions not two. Physical, chemical , and nuclear. A physical reaction can be reversed. Disolving table talt in water is a good example. Sodium and chloride ions are freed in the solution but reform as the water evaporates. Resulting in table salt again, no change in molecular structure and containing the original elements. Chemical reactions change the electron interactions between atoms and form new molecules. An example of this is mixing vinegar and baking soda. This forms carbon dioxide, sodium acetate, and water. When the water evaporates you are left with sodium acetate, a different substance than you started with but made up of the same elements that were present at the start. The third type, nuclear reactions, actually change the atomic structure at an elemental level by breaking or forming bonds in the nucleus of the atom to form different elements than when you started. This type of reaction obviously can not be demonstrated with a simple home experiment. In short, you are completely wrong.Anonymoushttps://www.blogger.com/profile/10918628546045305452noreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-52360630408212906292015-07-27T13:52:17.890-04:002015-07-27T13:52:17.890-04:00As the poster about fritted glass funnels commente...As the poster about fritted glass funnels commented, I have also used this to clean fritted glass funnels, it works better than anything else.<br /><br />I usually fill the clogged funnel halfway with nitric acid, concentrated, then add 1-2 drops of EtOH. There is a short delay in the reaction and it is highly exothermic and evolves a brown/orange gas-toxic. Do this in a fume hood with the sash down, I would also recommend a blast shield in front of the things you are cleaning just in case you have a shaky hand and drop too much EtOH into the nitric acid. Make sure your things are also clamped down.<br /><br />We have used this reaction to even clean silver that had metalized in our frits out, from silver salts.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-7019169206802411502015-03-10T13:24:55.923-04:002015-03-10T13:24:55.923-04:00You need to state the size of the aspirin (i.e. mg...You need to state the size of the aspirin (i.e. mg).Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-76939672524808710692014-11-24T18:24:55.708-05:002014-11-24T18:24:55.708-05:00I did this experiment with unflavoured gelatin and...I did this experiment with unflavoured gelatin and nothing happened.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-57384494483767101672014-07-02T18:49:05.730-04:002014-07-02T18:49:05.730-04:00Citric acid is also available at Wal-Mart for abou...Citric acid is also available at Wal-Mart for about 3 bucks a bottle. They keep it in housewares with the mason jars, rather than with the grocery items.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-78813069517900400732014-05-25T21:35:56.725-04:002014-05-25T21:35:56.725-04:00Anonymous' comment on reversible reactions is ...Anonymous' comment on reversible reactions is not correct. It repeats a common myth - often found in high school textbooks unfortunately. Some but not all physical reactions are reversible (Try reversing an atomic explosion!)but plenty of chemical reactions are reversible. The distinction between physical and chemical reactions is arbitrary and does not really give great scientific insight anyway but it is more usefully based on the re-arranging breaking and creation of interatomic bonds. Thus it is perfectly reasonable to argue that dissolving of ionic compounds is indedd chemical.The other old chestnut relates to the amount of energy involved which usually argues that chemical changes involve more heat but again arbitrary and ultimately wrong - again think of an atomic bomb or the sun!Trevor Walkingtonnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-41514749192676115112014-05-12T15:23:35.499-04:002014-05-12T15:23:35.499-04:00Thank you for this formula. However, I found that ...Thank you for this formula. However, I found that distilled vinegar at 5% does not work. Had to check with several neighbors to get the right one. I am making copper jewelry and want the verdigris instead of the black from liver of sulfur.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-88223436912244502642014-01-16T17:22:41.596-05:002014-01-16T17:22:41.596-05:00That is so coolThat is so coolAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-163170242323686242014-01-16T17:20:22.420-05:002014-01-16T17:20:22.420-05:00How do the hanwarmers that you shake heat How do the hanwarmers that you shake heat Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-40839862831159494102014-01-11T10:30:28.283-05:002014-01-11T10:30:28.283-05:00Very Cool Experiment. Love the pictures, video and...Very Cool Experiment. Love the pictures, video and detail. Thanks for posting!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-42364177964100080212013-12-26T15:08:58.722-05:002013-12-26T15:08:58.722-05:00Powdered metals of several kinds (including iron a...Powdered metals of several kinds (including iron and aluminum) are known to "combust" when exposed to air. If you add a chemical oxidizer: watch out! It's very dangerous to accelerate the oxidation process. <br /><br />aluminum powder is added to certain explosive to "enhance" them. (It's an important ingreadiant in flash powder). Iron powder is known to have been used in mixing solid rocket propellants. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-85743059194670554972013-12-26T13:44:24.476-05:002013-12-26T13:44:24.476-05:00I wonder what would happen if you mix uranium with...I wonder what would happen if you mix uranium with it.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-58771035518968216812013-12-08T12:14:37.853-05:002013-12-08T12:14:37.853-05:00How do the manufacturers keep them from instantly ...How do the manufacturers keep them from instantly heating before they package the warmers? Do they mix the ingredients and package them in a vacuum system to keep the air from getting to them? Just curious<br />Anonymoushttps://www.blogger.com/profile/02535502123740502631noreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-43771620092397264052013-12-04T18:28:21.050-05:002013-12-04T18:28:21.050-05:00do you have to use hand warmers????
can you use fe...do you have to use hand warmers????<br />can you use feeet or toe warmers??Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-67525377121905872892013-11-01T06:35:31.210-04:002013-11-01T06:35:31.210-04:00I know that this bog is several years old, but her...I know that this bog is several years old, but here's a YouTube video of supposedly nitric acid + ethanol reaction:<br /><br />http://m.youtube.com/watch?v=PzI1Dnz1wzEAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-16830221635778541392013-10-29T09:08:14.675-04:002013-10-29T09:08:14.675-04:00I just collected some chalk from the ground near a...I just collected some chalk from the ground near a chalk pit; it works a treat with both vinegar and lemon juice! You can see the bubbles fizzing off the chalk.Anonymoushttps://www.blogger.com/profile/12921977229572068380noreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-45178404194570361182013-10-09T20:52:44.626-04:002013-10-09T20:52:44.626-04:00I did this in class it worked really wellI did this in class it worked really wellAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-55689041622906655622013-06-01T00:09:02.004-04:002013-06-01T00:09:02.004-04:00wow that is really coolwow that is really coolAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-59011918001236627662013-05-27T18:19:21.272-04:002013-05-27T18:19:21.272-04:00Try watching Steve Spangler he is a great scientis...Try watching Steve Spangler he is a great scientist. I have to watch him from you tube because they don't broadcast it in New Zealand. Have fun!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-14798007326725394362013-05-05T05:58:11.880-04:002013-05-05T05:58:11.880-04:00My student and I had a similar experiment, and got...My student and I had a similar experiment, and got the same results - barely nothing. We left the chalk-vinegar solution overnight with a balloon covering the bottle, but in the morning we only had a very small balloon. Almost nothing at all.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-37615845121239146412013-04-26T04:12:00.759-04:002013-04-26T04:12:00.759-04:00Hi,
Your style of presentation is very impressive...Hi,<br /><br />Your style of presentation is very impressive. The meaningful contribution of your mind reflects on those people who are looking for new ideas.<br /><a href="http://www.bioassaysys.com/products.php?q=Phosphate" rel="nofollow">Phosphate Assay Kit</a><br /><br />Thanks a lot!<br />Mark Holland<br />Anonymoushttps://www.blogger.com/profile/18338661368203977474noreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-73560941540904629522013-03-02T04:17:21.848-05:002013-03-02T04:17:21.848-05:00any news on chemlab 500 instruction manual? i boug...any news on chemlab 500 instruction manual? i bought it an auction for my son's birthday.. but to his disappointment, the instruction manual is missing :(. Please help.. email me at:<br />sum1elsesangel@yahoo.com<br /><br />thanks!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-43851841563923073152012-12-29T22:13:49.842-05:002012-12-29T22:13:49.842-05:00Totally an A+ narc Broham, anyone whoms been aroun...Totally an A+ narc Broham, anyone whoms been around a tv or computer or any other type of propaganda/entertainment device has seen the "Simpsons", the longest running show in history I believe. Joseph Douglas Jewellnoreply@blogger.com