Chemistry

Re: PhD defense study???

Updated: 2010-02-25 18:48:55

A basic underlying knowledge of physical organic chemistry is a must, it would be prudent to review from that book as well.

If a student adds solid sodium chloride to a saturated solution of ammonium chloride, the correct interpretation of LeChatelier's Principle will predict thata. more solid will dissolveb. more solid will precipitatec. ammonia will form by a redox reactiond. metallic sodium will form by a redox reactione. the equilibrium constant will decreaseMy initial guess for this problem was B. more solid will precipitate but i wanted to see if there was a better answer to the question. Thanks.

Re: Why can't a polar substance dissolve a non-polar?

Updated: 2010-02-25 18:10:23

Quote from: renge ishyo on Today at 07:00:09 AMit does not stay Br2 in water forever, but rather it is ionized by water to H+ and Br- in solution.You'll get hypobromous acid as well as HBr:Br2 + H2O <----> HOBr + HBr

Re: Why can't a polar substance dissolve a non-polar?

Updated: 2010-02-25 18:00:09

UserInfo : February 25, 2010, 08:50:07 AM Welcome , Guest Please login or register Did you miss your activation email 1 Hour 1 Day 1 Week 1 Month Forever Login with username , password and session length Forum Rules Read This Before Posting Home Help Search Calendar Login Register Search Chemical Forums ChemicalForums , Google Chemistry-Blog Eating Carbon Nanotubes Chemistry-Blog.com Google Sponsors Content ChemBuddy ChemFeeds Chemical Forums Chemistry Blog Chem Reddit : Resources General Chem Word Dict . Periodic Table Chemical Forums Chemistry Forums for Students Undergraduate General Chemistry Forum Moderators : tamim83 Dan Why can't a polar substance dissolve a non-polar Pages : 1 Go Down previous next Print Author Topic : Why can't a polar substance dissolve a non-polar Read 198 times 0 Members and 1 Guest are viewing this topic . Gargamel Regular Member Mole Snacks : 0 2 Offline Gender : Posts : 26 Why can't a polar substance dissolve a non-polar : on February 23, 2010, 09:58:21 AM Hi I wonder why for example water can't dissolve methan or . dichlor I mean water is polar and therefore contains a partiel positive charge and a partiel negative charge . This charge must be able

Re: Need help determining empirical formula for hydrate lab

Updated: 2010-02-25 17:56:20

Quote from: evolution619 on Yesterday at 06:19:14 PMso if I found the moles of water per anhydrous salt will I get x?yes

2010 Mole Calculations Mastery Workshop – Early Bird Registration opens!

Updated: 2010-02-23 13:32:14

Mole Calculations has been voted as #1 Killer Topic for ‘O’ Level Chemistry Click on the PLAY button (2 mins audio) to find out why! >> Click HERE for Early Bird Registration to enjoy discounts & bonuses >> Click HERE for Early Bird Registration to enjoy discounts & bonusesRelated Articles: GCE O level Mole Calculations Mastery Workshop 2009 (Registration [...]

Copernicium confirmed as name of element 112

Updated: 2010-02-21 14:33:35

You are here : WebElements Periodic Table Nexus WebElements Nexus WebElements : the periodic table on the web Search this site : Home Elements Compounds Periodicity Forum News Chemistry Site index References WebElements blog Contact Chemistry literature feeds ACS journals J . Am . Chem . . Soc Inorg . . Chem Organometallics Acc . Chem . . Res Chem . . Mat J . Organic . Chem J . Phys . Chem . A J . Phys . Chem . B Langmuir Macromolecules Nanoletters RSC journals Chem . . Commun Dalton Transactions Chem . Soc . . Rev Faraday . Disc J . Material . Chem Org . and Biomol . . Chem Chemical Education Merlot chemistry NASA podcasts R.Science Molecules MolBase Oxford MotM Science blogs RSC World blog ScienceBlogs Reactive Reports Sciencebase Chemistry Copernicium Copernicium confirmed as name of element 112 Copernicium confirmed as name of element 112 IUPAC has officially approved the name copernicium , with symbol Cn , for the element of atomic number 112. Priority for the discovery of this element was assigned , in accordance with the agreed criteria , to the Gesellschaft für Schwerionenforschung GSI Center for Heavy Ion Research in Darmstadt , Germany . The team at GSI proposed the name

Extreme makeover chemistry style

Updated: 2010-02-19 03:48:35

In revisiting a chemical reaction that's been in the literature for several decades and adding a new wrinkle of their own, scientists with Berkeley Lab and the University of California (UC) Berkeley have discovered a mild and relatively inexpensive procedure for removing oxygen from biomass. This procedure, if it can be effectively industrialized, could allow a number of of today's petrochemical products, including plastics, to instead be made from biomass........

Chemists synthesize herbal alkaloid

Updated: 2010-02-19 03:48:35

The club moss Lycopodium serratum is a creeping, flowerless plant used in homeopathic medicine to treat a wide variety of ailments. It contains a potent brew of alkaloids that have attracted considerable scientific and medical interest. However, the plant makes a number of of these compounds in extremely low amounts, hindering efforts to test their therapeutic value........

Synthesis of hydrogen fuel storage material may become less complicated

Updated: 2010-02-19 03:48:35

An international team of scientists has identified a new theoretical approach that may one day make the synthesis of hydrogen fuel storage materials less complicated and improve the thermodynamics and reversibility of the system. A number of scientists have their sights set on hydrogen as an alternative energy source to fossil fuels such as oil, natural gas and coal that contain carbon, pollute the environment and contribute to global warming. Known to be the most abundant element in the universe, hydrogen is considered an ideal energy carrier - not to mention that it's clean, environmentally friendly and non-toxic. However, it has been difficult to find materials that can efficiently and safely store and release it with fast kinetics under ambient temperature and pressure........

New perspective on periodic table

Updated: 2010-02-19 03:48:35

Transforming lead into gold is an impossible feat, but a similar type of "alchemy" is not only possible, but cost-effective too. Three Penn State scientists have shown that certain combinations of elemental atoms have electronic signatures that mimic the electronic signatures of other elements. As per the team's leader A. Welford Castleman Jr., Eberly Distinguished Chair in Science and Evan Pugh Professor in the Departments of Chemistry and Physics, "the findings could lead to much cheaper materials for widespread applications such as new sources of energy, methods of pollution abatement, and catalysts on which industrial nations depend heavily for chemical processing"........

Learning from Snowflake chemistry

Updated: 2010-02-19 03:48:35

There is more to the snowflake than its ability to delight schoolchildren and snarl traffic. The structure of the frosty flakes also fascinate ice chemists like Purdue University's Travis Knepp, a doctoral candidate in analytical chemistry who studies the basics of snowflake structure to gain more insight into the dynamics of ground-level, or "tropospheric," ozone depletion in the Arctic........

Novel hydrogen storage method

Updated: 2010-02-19 03:48:35

Researchers at the Carnegie Institution have found for the first time that high pressure can be used to make a unique hydrogen-storage material. The discovery paves the way for an entirely new way to approach the hydrogen-storage problem. The scientists observed that the normally unreactive, noble gas xenon combines with molecular hydrogen (H2) under pressure to form a previously unknown solid with unusual bonding chemistry. The experiments are the first time these elements have been combined to form a stable compound. The discovery debuts a new family of materials, which could boost new hydrogen technologies. The paper is reported in the November 22, 2009, advanced online publication of Nature Chemistry.......

memorise all 112 elements of periodic table

Updated: 2010-02-19 03:48:35

Is there an easy way to memorise all 112 elements? Yes, there is. You could make up a melody, and sing them. Melody is a great mnemonic device. The idea was used by Carleton... .......

Best Motivational Video – You got to watch it!

Updated: 2010-02-19 02:26:44

If you have only 2 mins to spare on my website today, go watch this motivational video below. Forget about the rest~ Click HERE for direct URL if you can’t view the above video Whether you are a: Students that didn’t do so well in GCE ‘O’ Levels Exam (or other exams) last year and landed in a [...]

Pittcon 2010 In Orlando

Updated: 2010-02-18 14:00:00

This year’s pittcon aims to be the most comprehensive conference and exposition on laboratory science

Early Registration for ACS National Meeting Ends Today

Updated: 2010-02-16 19:30:00

Early registration ends today, Tuesday, February 16, at midnight ET, for the upcoming 239th ACS National Meeting in San Francisco. Today is your last chance to enjoy the many benefits of attending a national meeting - networking with your peers, meeting leading scientists, discovering new research, and advancing your career - for up to $120 less than the standard registration rate (which starts on Wednesday). Register online now and save! For information about the technical program, travel discounts, social events, workshops, the exposition, career fair and more, visit the San Francisco meeting web site.

Submit Abstracts Now for Green Chemistry Conference in DC

Updated: 2010-02-16 19:30:00

Abstract submittal is still open for the upcoming 14th Annual Green Chemistry & Engineering Conference , which returns to downtown Washington, DC, June 21-23, 2010. Choose from more than 20 technical sessions, but don't wait too long - the deadline for abstracts is next Tuesday, February 26. The conference theme is "Innovation & Application," and with one of the renowned founders of green chemistry, Dr. John Warner (President and CTO, Warner Babcock Institute for Green Chemistry) as the chair, this conference is shaping up to be one you don't want to miss! Confirmed keynote and guest speakers include the popular environmentalist, entrepreneur and author Paul Hawken, as well as US Congressman John Tierney (D-MA), co-sponsor of the "Green Jobs Act." Sponsorship and exhibition opportunities are also available. Housing and registration for the conference are also open; for more information, visit the conference website or contact us with e-mail at greenchem2010@acs.org or by phone at (202) 872-6102.

FEATURE: Special Sustainability Events at San Francisco National Meeting

Updated: 2010-02-16 19:30:00

American Chemical Society ACS Journals C EN CAS About Us Contact Help Log In Publications Meetings Careers Membership Networks Education Policy Funding Awards Press Room You Are : Here Home Meetings San Francisco Spring 2010 Technical Program Thematic Program Chemistry for a Sustainable World The theme for the 239 th ACS National Meeting is Chemistry for a Sustainable World . This timely theme is appropriately chosen for the host city of San Francisco , CA , which has already established a city sustainability plan . The meeting's multidisciplinary symposia provide an opportunity to educate attendees about current sustainability initiatives and how to use chemistry to improve our global . environment Thematic Program Chair : Professor Laura E . Pence Department of Chemistry , University of Hartford Member of the ACS Committee on Environmental Improvement Confirmed Events Plenary Symposium : Big Picture Concerns and Real Green Chemistry Solutions Sunday , March 21 3:00-6:10 p.m . Moscone Center , Gateway Ballroom 103 Organizer : Robert Peoples , co-sponsored by the Green Chemistry Institute Speakers : Jean-Michel Cousteau Ocean Futures Society Robert Grubbs Victor and Elizabeth

Spring ACS Regional Meetings

Updated: 2010-02-16 19:30:00

For a great mix of professional and technical exchange, career services and networking opportunities, and social events with a definite local flavor, make plans to be at one of the spring 2010 series of ACS Regional Meetings. Kicking off in April with the 41st ACS Middle Atlantic Regional Meeting (MARM), the spring ACS Regional Meetings will be held in strong scientific communities across the country. Visit the ACS Regional Meetings home page for links to the home pages of each of the meetings, where you'll find links for abstract submittal, early registration, and hotel reservations. The Spring Regional Meetings are the 41st Middle Atlantic Regional Meeting (MARM), April 10-13, 2010, Wilmington, DE; the 37th Northeast Regional Meeting (NERM), June 2-5, Potsdam, NY; the 42nd Central Regional Meeting (CERMACS), June 16-19, Dayton, OH; and the Joint 65th Northwest and 22nd Rocky Mountain Regional Meetings (NORM/RMRM), June 20-23, Pullman, WA.

2009 GCE ‘O’ Level Results – Student’s Hardwork & Active Participation paid off

Updated: 2010-02-15 06:48:20

“Hi Sean, just want to say a BEEG thank you being an inspiring teacher. Your passion for Chemistry & dedication in teaching are a great motivation & inspiration to your students. You do not choose only the ‘A’ grade students but inspire them to be. Because of your help, Tim (Timothy) improved his Chemistry and [...]

O Level Chemistry: Periodic Table & Group Trends (I, VII & 0)

Updated: 2010-02-12 01:36:48

Last week, we have discussed on the Common Properties of a Group (in general). Today, let’s take a closer look at the properties of elements from 3 very important groups that examiners like to test you: Properties of Impt Groups in Periodic Table: Group I (Alkali Metals) Soft & Silvery Metals Low Densities & Low MPs Has 1 valence electron Forms ions [...]

An MS method for proteomic analysis of small samples

Updated: 2010-02-11 14:00:00

Researchers develop an MS shotgun proteomic method to tackle small numbers of cancer cells in blood. </img

Is Teaching just about giving information & instructions?

Updated: 2010-02-08 05:50:11

TEACHER = EDUCATOR ??? Since the inception of this F-R-E-E Chemistry website few days ago, i have received numerous emails and blog comments by educators from different regions – about the roles of “Teachers” and “Educators”. Many in Singapore associates Teachers to only NIE-Trained Teachers which applies to Primary, Secondary & Junior College Teachers. Personally, i thought [...]

Chemical Journalism

Updated: 2010-02-04 20:22:33

For those with an interest in journalism and time this summer ACS is offering a summer internship in the C&EN newsroom. Deadline is Feb 22nd. Chemical & Engineering News, the weekly newsmagazine of the American Chemical Society, seeks an intern for our Science/Technology/Education department for the summer of 2010. C&EN reports current events in the chemical enterprise, [...]