Bindung & Struktur

Video (179 Stunden)

Molecules come in infinite varieties, so in order to help the complicated chemical world make a little more sense, we classify and categorize them. One of the most important of those classifications is whether a molecule is polar or non-polar, which describes a kind of symmetry - not just of the molecule, but of the charge. In this edition of Crash Course Chemistry, Hank comes out for Team Polar and describes why these molecules are so interesting to him. You'll learn that molecules need to have both charge asymmetry and geometric asymmetry to be polar, and that charge asymmetry is caused by a difference in electronegativities. You'll also learn how to notate a dipole moment (or charge separation) of a molecule, the physical mechanism behind like dissolves like, and why water is so dang good at fostering life on Earth. Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: https://apple.co/3d4eyZo Download it here for Android Devices: https://bit.ly/2SrDulJ -- Table of Contents Charge Asymmetry & Geometric Asymmetry 01:33 Difference in Electronegatives 01:49 Hank is Team Polar 00:33 Dipole Moment 03:49 Charge Separation of a Molecule 04:12 Like Dissolves Like 04:41 Water is Awesome 05:10 Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids

Youtube

Video (147 Stunden)

Just how small are nanomaterials? And what can we do with stuff that small? Today we’ll discuss some special properties of nanomaterials, how some can change at different sizes, and the difference between engineered nanomaterials and ones that occur naturally. We’ll also talk about some of the future research that’s needed on the use of nanomaterials. Crash Course Engineering is produced in association with PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV Check out Deep Look: https://www.youtube.com/channel/UC-3SbfTPJsL8fJAPKiVqBLg *** RESOURCES: http://www.safenano.org/knowledgebase/resources/faqs/what-is-a-nanomaterial/ https://www.niehs.nih.gov/health/topics/agents/sya-nano/index.cfm https://ec.europa.eu/health/scientific_committees/opinions_layman/nanomaterials/en/l-2/1.htm https://www.nano.gov/nanotech-101/what/seeing-nano https://www.britannica.com/technology/nanotechnology http://www.essentialchemicalindustry.org/materials-and-applications/nanomaterials.html https://www.britannica.com/technology/scanning-tunneling-microscope http://www.hwnanomaterial.com/nanomaterials_n63 https://www.hindawi.com/journals/amse/2016/4964828/ https://www.nano.gov/nanotech-101/special https://www.zdnet.com/article/nanotechnology-to-end-insulin-injections-for-diabetics/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4240321/ http://news.mit.edu/2014/solid-nanoparticles-deform-like-liquid-1012 https://www.nanoscience.com/applications/education/overview/cnt-technology-overview/ http://www.understandingnano.com/nanotubes-carbon.html http://newscenter.lbl.gov/2016/10/06/smallest-transistor-1-nm-gate/ https://www.theverge.com/circuitbreaker/2016/10/6/13187820/one-nanometer-transistor-berkeley-lab-moores-law *** Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark Brouwer, Kenneth F Penttinen, Trevin Beattie, Satya Ridhima Parvathaneni, Erika & Alexa Saur, Glenn Elliott, Justin Zingsheim, Jessica Wode, Eric Prestemon, Kathrin Benoit, Tom Trval, Jason Saslow, Nathan Taylor, Brian Thomas Gossett, Khaled El Shalakany, Indika Siriwardena, SR Foxley, Sam Ferguson, Yasenia Cruz, Eric Koslow, Caleb Weeks, D.A. Noe, Shawn Arnold, Malcolm Callis, Advait Shinde, William McGraw, Andrei Krishkevich, Rachel Bright, Mayumi Maeda, Kathy & Tim Philip, Jirat, Ian Dundore -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids

Youtube

Wiki

Was ist eigentlich ein Salzsee? Und weshalb geht man dort nicht unter? Diese Fragen werden vom Klexikon altersgerecht erklärt.

Klexikon

Tool

Zuordnung der jeweiligen zwischenmolekularen Kraft für verschiedene Moleküle mit Hilfe eines einfachen Schemas durch die Beantwortung von bis zu drei Fragen

Chemie Lernprogramme

Tool

Vergleich der Wasserstoffbrückenbindungen verschiedener Moleküle

Chemie Lernprogramme

Tool

Ermittelt die Verhältnisformel von Salzen nach Eingabe der Namen der enthaltenen Ionen

Chemie Lernprogramme

Tool

Übung mit Veranschaulichung der verschiedenen Zahlenverhältnisse in Abhängigkeit von der Ionenladung

Chemie Lernprogramme

Tool

Übung zur Benennung von Salzen

Chemie Lernprogramme