Friday, March 20, 2020

The eNotes Blog Scholarship Spotlightâ€March 2016

Scholarship Spotlight- March 2016 Every month, we select some of the best scholarships around and post them here on our blog. When you are ready to apply, check out our tips on  How to Write a Scholarship Essay. Visit   Essay Lab  if you’re looking for a writing expert  to review and provide feedback on your scholarship or college application essays! Dolman Law Group Video Essay Scholarship Amount: $1,100 Bi-Annual Scholarship Eligibility:  Must be currently attending or planning to attend a college or university during the 2016-2017 academic year.  Must be in good academic standing with your current educational institution.  For applicants under 18, you must have permission from a parent or legal guardian Requirements:  Must apply to the contest via email and provide your name, address, and the name of the institution you are attending or plan to attend.  Must provide your video essay (YouTube format preferred) by the deadline of 03/15/16. Essay Topic: In order to participate in the essay contest, applicants must present 2-3 minute video essay discussing the following issue: Much has been made about the potential of driverless and automated car technology in recent years, and many industry observers expect this technology to be widely available within the next decade. Technology is never perfect however, and  accidents involving driverless vehicles  have already occurred. Various legal issues arise when autonomous cars are involved in accidents, including determining who should be held liable for an accident. In your opinion, who should be held accountable when a driverless vehicle is involved in an accident? The owner? The manufacturer? The software developer? Explain. Due Date: March 15, 2016 Learn more and apply Couponing in College Scholarship Amount: $2,500 Eligibility:  Any U.S. resident enrolled in a university within the 50 states or the District of Columbia can apply for this scholarship.  Contestants must demonstrate both knowledge in couponing and saving money, while also demonstrating the technical aptitude to understand how to publish online (a skill we think is critical in todays economy). Requirements:  To enter, you must publish a 500+ word essay providing tips and strategies for utilizing coupons of any type (physical, digital, mobile) to save money while in college. The essay should be published on a blog or any website which allows the publication of articles. You must mention this contest in your published essay, and provide a link back to this contest page. Due Date: March 25, 2016 Learn more and apply QuitDay.org Scholarship Amount: $2,000, $700, and $300 to 3 winners Eligibility: The QuitDay Scholarship essay contest is open to undergraduate and graduate students who are 18 years old or older. Applicants must be accepted to, or currently enrolled in a college or university located within the United States  or in the District of Columbia.   Only one (1) submission per student is allowed. Requirements:  Applicants must submit a typed essay (1,000–1,500 words) answering the following questions: Why do you see smoking as a problem for individuals  and society? What is the best way  for  society to overcome the issue of smoking, and why? What would a smoke-free world look like, and  how would it differ from the world today? What message do you have for current smokers? The essay must include the word count and be signed with a full name (both first and last name), along with  the applicant’s email address, phone number and permanent address. The winning applicants will be determined based on the essay content, style and originality. Judges are looking for logically organized and well-supported essays. Due Date: March 31, 2016 at 5:00 PM EST. Learn more and apply Sleeklens Academic Scholarship Program Amount: $2,000 to 3 winners Eligibility:  To qualify for the scholarship, you must be an Undergraduate, a Graduate, or a High School senior with a legitimate acceptance letter from an accredited University or College.  The Sleeklens Academic Scholarship Program is open to people of all nationalities. Requirements:  Write an essay according to the instructions provided below and send it to Scholarships@Sleeklens.com. Fill in and submit the application form.  Write an essay that is between 1000 and 1600 words as per the following instructions. Students use social media and the internet in all kinds of ways, from keeping in touch with their friends to researching for and submitting assignments. One of the least thought about uses of social media is leveraging it to get a job after college. Discuss some of the ways that you could use social media to get a job after college. What are some of the advantages and disadvantages of using social media to get a job after college? Due Date: March 31, 2o16 at 11:59 PM EST Learn more and apply SuretyBonds.com 2016 Small Business Scholarships SuretyBonds.com is a small business that works alongside entrepreneurs and business owners everyday to help grow existing businesses or launch new ones. Theyve been a leader in the surety bond industry since 2009 and their success and growth would not happen without the successes of small business owners. The scholarship program is their way of giving back to the small business community and encouraging students to share their stories. Amount: $1,500 to 3 winners Eligibility:  You must be enrolled as a full-time student in a higher education program for Fall 2016 and you must have small business experience. Requirements: Write a 500 to 1,000-word essay on how a small business has influenced your life and how you plan to use that experience in the future. Email your essay to scholarships@suretybonds.com by March 31, 2016 and make sure to check our official rules and guidelines before submitting. The SuretyBonds.com Scholarship Committee will look at the submissions and select 10 finalists. From those finalists, three winners will be awarded the scholarships based on the amount of votes they get. Voting is open from May 1 to May 31 and the winners will be notified and announced on June 3. Due Date: March 31, 2o16 Learn more and apply

Tuesday, March 3, 2020

List of Common Strong and Weak Acids

List of Common Strong and Weak Acids Strong and weak acids are important to know, both for chemistry class and for use in the lab. There are very few strong acids, so one of the easiest ways to tell strong and weak acids apart is to memorize the short list of strong ones. Any other acid is considered a weak acid. Key Takeaways Strong acids completely dissociate into their ions in water, while weak acids only partially dissociate.There are only a few (6) strong acids, so many people choose to memorize them. All the other acids are weak.The strong acids are hydrochloric acid, nitric acid, sulfuric acid, hydrobromic acid, hydroiodic acid, perchloric acid, and chloric acid.The only weak acid formed by the reaction between hydrogen and a halogen is hydrofluoric acid (HF). While technically a weak acid, hydrofluoric acid is extremely powerful and highly corrosive. Strong Acids Strong acids dissociate completely into their ions in water, yielding one or more protons (hydrogen cations)  per molecule. There are only 7 common strong acids. HCl - hydrochloric acidHNO3  - nitric acidH2SO4  - sulfuric acid (HSO4-  is a weak acid)HBr - hydrobromic acidHI - hydroiodic acidHClO4  - perchloric acidHClO3 - chloric acid Examples of ionization reactions include: HCl → H Cl- HNO3 → H NO3- H2SO4 → 2H SO42- Note the production of positively charged hydrogen ions and also the reaction arrow, which only points to the right. All of the reactant (acid) is ionized into product. Weak Acids Weak acids do not completely dissociate into their ions in water. For example, HF dissociates into the H and F- ions in water, but some HF remains in solution, so it is not a strong acid.  There are many more weak acids than strong acids. Most organic acids are weak acids. Here is a partial list, ordered from strongest to weakest. HO2C2O2H -  oxalic acid  H2SO3  -  sulfurous acidHSO4  -  - hydrogen sulfate ionH3PO4  - phosphoric acidHNO2  - nitrous acidHF - hydrofluoric acidHCO2H -  methanoic acidC6H5COOH -  benzoic acidCH3COOH - acetic acidHCOOH - formic acid Weak acids incompletely ionize. An example reaction is the dissociation of ethanoic acid in water to produce hydroxonium cations and ethanoate anions: CH3COOH H2O ⇆ H3O CH3COO- Note the reaction arrow in the chemical equation points both directions. Only about 1% of ethanoic acid converts to ions, while the remainder is ethanoic acid. The reaction proceeds in both directions. The back reaction is more favorable than the forward reaction, so ions readily change back to weak acid and water. Distinguishing Between Strong and Weak Acids You can use the acid equilibrium constant Ka or else pKa to determine whether an acid is strong or weak. Strong acids have high Ka or small pKa values, while weak acids have very small Ka values or large pKa values. Strong and Weak vs. Concentrated and Dilute Be careful not to confuse the terms strong and weak with concentrated and dilute. A concentrated acid is one which contains a low amount of water. In other words, the acid is concentrated. A dilute acid is an acidic solution that contains a lot of solvent. If you have 12 M acetic acid, its concentrated, yet still a weak acid. No matter how much water you remove, that will be true. On the flip side, a 0.0005 M HCl solution is dilute, yet still strong. Strong vs. Corrosive You can drink diluted acetic acid (the acid found in vinegar), yet drinking the same concentration of sulfuric acid would give you a chemical burn. The reason is that sulfuric acid is highly corrosive, while acetic acid is not as active. While acids tend to be corrosive, the strongest superacids (carboranes) are actually not corrosive and could be held in your hand. Hydrofluoric acid, while a weak acid, would pass through your hand and attack your bones.