# Tag Info

0

https://sdbs.db.aist.go.jp/sdbs/cgi-bin/direct_frame_top.cgi Enter the CAS Number and there you go!

3

Oxalic acid is a relatively strong acid for a carboxylic acid, and according to my sources below, can auto-catalyze the reaction with Potassium Permanganate. So, the reaction you performed was likely just the same mechanism that you have seen everywhere else. My source is as follows: Kovacs K.A.; Grof P.; Burai L.; Riedel M. (2004). "Revising the mechanism ...

0

Why do most people want to believe that on burning fuel little or no carbon monoxide is created? Yes, it could be true, mainly CO2 is formed, but read these qualifying comments from a source: A properly designed, adjusted, and maintained gas flame produces only small amounts of carbon monoxide, with 400 parts per million (ppm) being the maximum allowed ...

2

Changes in volume The chemical reaction for burning a candle is something like this: $$\ce{C25H52 + 38 O2(g) -> 25 CO2(g) + 26 H2O(g)}$$ For every 38 dioxygen molecules used, you are making 25 carbon dioxide molecules and 26 water molecules (which start out as a gas, but will condense once they reach an area of lower temperature such as the glass ...

1

For one, pure water has a certain refractive index, $n_D = 1.333$ at a temperature of $20\,^\circ{}\mathrm{C}$. For the other, the presence of a solute alters this optical property, which is used, for example to estimate the sugar content in grapes (see, for example an earlier answer by mine here). «Calibrating your tools» would now request that you ...

0

There is a field of chemistry/metallurgy that uses applied potential to measure corrosion response of metals in various solutions : lookup Pourbaix Diagram. There are many books on the topic. ( My excuse for not posting this a year ago is that hydrogen stress cracking is my favorite subject and I got distracted.)

1

There is a slight deviation in the literature as to what the hybrid composites are. Originally, materials were considered hybrid composites if both inorganic (e.g. clay/silicates as the hydrophilic component) and organic (e.g. organic polymer as the hydrophobic component) constituents were involved in building up the matrix (see e.g. a review [1]). Another ...

2

You could create a constant-current source instead of using an off-the-shelf power supply. There are also off-the-shelf constant-current supplies, so ask your lab manager if that's a resource. An EE colleague can set this up for you if it's too far outside your domain. Here are a few articles as starting points. Total cost should be < $15. http://www.... 14 You can't control both voltage and current electrically: Your power supply will hold one or the other constant, but the properties of the electrolytic cell will then determine the other one. So you need to hold all of the chemical parts of the experiment constant: Have a large ion bath so that the concentration doesn't change much as the plating takes ... 4 Try to change the geometry of your electrodes. For example, increase or decrease the distance between the electrodes. This will modify the internal resistance of the solution. So if you have a generator producing a constant voltage, you may reach the desired currant, simply by changing the distance between the electrodes. Of course the electrodes must be ... 1 I have found in Germany sugar crystals that are about 5 mm thick. If you are able to get some, you may drop one of these crystals in a beaker with 50 mL water and an stirring bar. If not take a standard sugar cube. Using a watch, measure how long it takes for the crystal to be dissolved. Now start again with another rotating speed. Now break a new crystal in ... 4 If you mean the test tube containing the solids (reaction tube), then that tube faces downwards to promote the flow of gas into the receiving tube. The idea is to let the gas sink away from the reaction zone and towards the receiving tube as it cools and becomes more dense. The receiving tube, of course, faces down so that the ammonia gas, lighter than air,... 0 Yes, HNO2 is unstable, however, per Wikipedia the gaseous anhydride N2O3 is described as a: deep blue solid[1] is one of the simple nitrogen oxides. It forms upon mixing equal parts of nitric oxide and nitrogen dioxide and cooling the mixture below −21 °C (−6 °F):[2]$\ce{NO + NO2 ⇌ N2O3}\$ Dinitrogen trioxide is only isolable at low temperatures,...

2

You may find information from the US Federal government relating to this questions at the following sites: https://www.epa.gov/hwgenerators/steps-complying-regulations-hazardous-waste https://www.epa.gov/rcra/resource-conservation-and-recovery-act-rcra-regulations Furthermore, your organization (theoretically) has a local waste discharge permit that it must ...

4

My background is macromolecular crystallography; while experimental data was kept locked in the research laboratories in the 1980s, they are now widely available through the international protein database. For example, you can view the electron density of crambin at http://www.rcsb.org/3d-view/1EJG. The database for smaller structures is the Cambridge ...

1

Like any other linear polymer sucu as proteins and DNAs, RNA structure has two ends. Like carboxylic acid end and amine end notation given for proteins, two ends of a RNA (and DNA) call 3'-end and 5'-end (see the diagram below): Note that these notations are derived from the numbering of the ribose sugar function (see the 5'-end of the tetramer in the ...

Top 50 recent answers are included