Amphoteric Definition and Examples

Amphoteric Definition and Examples An amphoteric substance is one that can act as either an acid or a base, depending on the medium. The word comes from the Greek amphoteros  or amphoteroi, meaning each or both of two and, essentially, either acid or alkaline. Amphiprotic molecules are a type of amphoteric species that either donates or accepts a proton (H), depending on the conditions. Not all amphoteric molecules are amphiprotic. For example, ZnO acts as a Lewis acid, which can accept an electron pair from OH but cannot donate a proton. Ampholytes are amphoteric molecules that exist primarily as zwitterions over a given pH range and have both acidic groups and basic groups. Here are some examples of amphoterism: Metal oxides or hydroxides are amphoteric. Whether a metal compound acts as an acid or a base depends on the oxide oxidation state.Sulfuric acid (H2SO4) is an acid in water but is amphoteric in superacids.Amphiprotic molecules, such as amino acids and proteins, are amphoteric.

Kickstart Your Writing with Nanowrimo

Kickstart Your Writing with Nanowrimo Kickstart Your Writing with Nanowrimo Kickstart Your Writing with Nanowrimo By Brittiany Cahoon If you find your writing suffering latelyperhaps due to the shifting weather and gray skiesNanowrimo may be just what you need. Founded nine years ago, the yearly write a novel in a month event will have more than 100,000 participants from across the globe trying to write 50,000 words in the month of November. Thats over 1500 words a day, or just over four pages of typed text. It sounds crazy and probably is, but Nanowrimo teaches important writing habits that no fiction writer can afford to ignore: 1. Discipline: Assuming full-time novelists write one or two books a year, that writer probably writes somewhere between 500-1000 words a day. Forcing yourself to write more is like the old story of the marathon runner training with weighted shoes. Once the handicap comes off, youre even faster. 2. Ignoring the internal editor: With a quota of four pages a day, you cant afford to be a perfectionist. Your writing will be full of typos, spelling errors, and idiotic dialogue. Here is a sample from a participant of previous years: I think I am going to go to lunch now. Lunch? Now? Yes, I think this would be a good time. A good time? Why do you think it is a good time? Because I am hungry, and I am bored. But by allowing yourself to write crap you also allow yourself to write, which is more important. 3. Losing control: Many new authors try to control the plots of their stories and novels, resulting in deus ex machina situations, wooden characters, or unbelievable twists. Writing this fast forces you to give up control and simply write what comeswhich can later be edited into something readable without losing the spontaneity and realism in your rough draft. Nanowrimo novels often stink, but participating is a wonderful way to practice the writing habits you need every day of the year. To learn more or to sign up, visit http://nanowrimo.org. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Fiction Writing category, check our popular posts, or choose a related post below:"Because Of" and "Due To" The Possessive ApostropheEducational vs. Educative