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Chemistry
Learn All About The Strong Acids and Bases
Last Updated on June 18, 2023 by Sara Assem Acids and Bases play a vital role in our life and all of the environment around us. When you brush your teeth with toothpaste or wash your hands with soap or take your coffee, you’ve already experienced acids and bases. In chemistry, substances are classified as acids or bases or neutral, depending on some characteristics like PH and behavior with water. Acids and bases are also sub classified into weak and strong acids and bases, depending on the strength. In this article we will focus on strong acids and bases but first we will clarify some important definitions. General Look at Acids and Bases Before explaining strong acids and bases, we will first clarify what is meant by acids and bases in general and based on: Hydrogen ion H+ or hydroxide ion OH- production when dissolved in water. Transfer of proton. In case of mixing acids and bases, they react together to neutralize the properties and forming a salt and water. Acids An acid is a matter that produces ions of hydrogen (H+) when dissolved in water. All acids must contain at least one hydrogen ion. …
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Chemistry
Recrystallization | Definition, Principle, Purpose, Steps, Applications and More
Last Updated on May 14, 2023 by Sara Assem What is Recrystallization? The recrystallization definition is a process used for purifying compounds that contain impurities and these compounds are: – Dissolved at solvents. – Solids at room temperature. – Obtained from chemical reactions or natural sources. On the other hand, the impurities include mixtures of soluble, insoluble, and colored substances. Each type of these impurities needs to be removed by a separate procedure in the recrystallization process to obtain a pure compound. As we know what is recrystallization , we will also know in this article the purpose of the recrystallization experiment, types of crystallization, working principle, examples and steps of crystallization, what are the properties of the solvent used in recrystallization, important applications and more. The Purpose of Recrystallization The purpose of recrystallization is to separate or remove the impurities in a solid compound that are dissolved in a solvent to obtain a pure compound. And this technique depends on the fact “Solid materials tend to be more soluble in hot liquids than in cold liquids.” The Recrystallization Principle The Recrystallization principle depends on solubility: compounds with impurities (called solutes) tend to be more soluble in hot liquids (solvents) …
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Chemistry
Here’s What You’re Looking For in Diels Alder Reaction
Last Updated on November 15, 2022 by Sara Assem To understand Diels Alder reaction well, we will first clarify important definitions like alkene and diene. Alkenes Alkene is a class or a group of hydrocarbons that contains 1 carbon – carbon double bond at least. Alkene is also known as olefin and its general formula is CnH2n. Alkenes are more reactive than alkanes due to the presence of the carbon double bond that makes alkenes more reactive than alkanes (contain carbon-carbon single bond) Dienes Diene is a compound that contains two double bonds, usually between carbon atoms. There are 3 classes of dienes: Cumulated Diene (Allene): this class of dienes contains 2 successive double bonds on adjacent carbon atom. Isolated Diene: It contains 2 double bonds separated by 2 or more double bonds. Conjugated Diene: It contains 2 conjugated double bonds conjugated or separated by a single bond. It is used widely in polymer industry. Note: this classification is depends on the position of the double bond in the molecule. In this article, we will clarify Diels-Alder reaction, its mechanism of action, its examples, its applications, the virtual lab of the experiment that provided by PraxiLabs and more. In …
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News
Meet PraxiLabs at North Star Dubai 2022
Last Updated on November 15, 2022 by Sara Assem We are beyond excited to announce that PraxiLabs, the international leader in the field of virtual science labs, is participating in North Star Dubai – the world’s largest, most inclusive tech and startup show. PraxiLabs in Dubai for Further Expansion in the Middle East For further expansion in the Middle East, PraxiLabs participates in North Star Dubai as a prestigious exhibitor among the world’s most formidable minds in technology and business that deliver a slew of advanced innovations disrupting diverse sectors. PraxiLabs provides virtual science labs in Biology, Physics, and Chemistry. It aims to make scientific virtual labs accessible, usable, and affordable for educational institutions and schools. PraxiLabs does not only provide an immersive virtual lab experience, but it also adds enriched content that provides students with more understanding and knowledge. GITEX Global GITEX Global is the largest & most inclusive tech show in the global digital economy. Uniting seven communities in one awe-inspiring ecosystem in Dubai: tech enterprises, governments, startups, investors, coders, academia and youth. GITEX Global features mind-expanding talks across 14 conference sectors, along with hands-on workshops and accredited training courses. Meet us from October 10-14, 2022 …
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Chemistry
Chemistry Experiments Virtual Labs | How to Implement Them
Last Updated on November 15, 2022 by Sara Assem Chemistry is a science that revolves around experiments above all else. Chemistry experiments are considered some of the best ways for scientific learning and science investigation and evaluation. So without practical experiments, chemistry can’t be taught. We can define chemistry experiments as a group of actions and observations done to solve a question or particular problem, to support or falsify a hypothesis or research concerning phenomena conditions. This is doable by introducing some new variables with the purpose of studying them. Chemistry experiments are also used to train people who need to carry out a chemical or physical phenomenon. History of Chemistry Experiments Chemistry as a science depends on using a laboratory and cannot be effectively taught without doing experiments in it. Doing chemistry experiments in laboratories has a vital role in science curriculums as a means for our young students to make sense of the natural world they live in. Since the 19th century, when schools began to teach science systematically, science laboratories have become a distinctive feature of chemistry learning. After the First World War and with rapidly increasing scientific knowledge, science laboratories were used mainly as …
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News
Partners Toward Success | Praxilabs Signs Partnership Contract with Digital MQR
Last Updated on January 23, 2023 by Mostafa At PraxiLabs, we always strive to find innovative solutions for a developed educational future in all Arab countries. We are pleased to announce the signing of a partnership contract with “Digital MQR” in the Sultanate of Oman. Digital MQR is the first digital company in the Sultanate of Oman specialized in digitizing business and government and private institutions. It focuses deeply on digitizing the public and private educational sectors, starting from the educational institution’s infrastructure to advanced technological solutions such as (SMS, LMS, interactive panels, projectors, advanced teaching solutions, networks, surveillance cameras and systems). Digital MQR contributes to the digital transformation plan in the educational sector with solutions like biometric attendance and school consulting services in the field of management and quality control, virtual laboratories, virtual personal computer laboratories, language laboratories, solutions, and cloud devices). Dr. Khadija also conducted a practical experiment through PraxiLabs virtual labs to explain how the labs are used by students as well as professors, and pointed out the most important new features that have been added to our labs recently to make the learning experience more useful and immersive. PraxiLabs team extend their …
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Great News! +20 New Experiments Added to PraxiLabs Exceptionally Diverse Catalog
Last Updated on January 23, 2023 by Mostafa In order to provide you with an all-in-one portal of 3D interactive virtual science simulation, we’ve just added more than 20 new online virtual science experiments to PraxiLabs catalog. Our newly launched experiments cover topics in the fields of molecular biology, organic chemistry, analytical chemistry, thermodynamics, lab safety, and more. 7 New Virtual Science Experiments in Biology PraxiLabs new enriching experiments in biology cover vital topics in Molecular Biology (Genetics, Microbiology, Biochemistry) like: Bacterial Plating Out Technique Experiment (streak plate method) The streak plate method is a rapid qualitative isolation method. It is essentially a dilution technique that involves spreading a loopful of culture over the surface of an agar plate. By the end of the experiment you will learn how to: Become proficient at performing streak plate method consistently and accurately. Produce isolated colonies of an organism on an agar plate. Identify the organism: biochemical tests to identify bacteria are only valid when performed on pure cultures. Learn more DNA Fingerprinting using Gel Electrophoresis Virtual Lab Learn how gel electrophoresis relates to DNA fingerprinting and how to identify the criminal from the crime scene. Find out more Antibiotic Sensitivity …
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Biology
7 Different DNA Extraction Methods
Last Updated on May 25, 2023 by Sara Assem DNA extraction is one of the basic techniques employed in the molecular laboratory, done for the first time by Friedrich Miescher in 1869. In this article, we will focus on DNA extraction methods, comparing methods for more understanding. Along with this, we will explain DNA extraction protocol, DNA extraction experiment, and advantages DNA extraction methods. Although Friedrich Miescher isolated the cell material “nuclei” or “nucleic acid” and developed a method for nucleic acid isolation, he was not sure whether what he isolated was DNA or not. In 1958 Stahl and Meselson developed a full-function protocol for DNA extraction (The density gradient centrifugation protocol) that was the first protocol described for isolating DNA from E.coli bacteria. what is DNA Extraction ? DNA extraction is a process that used to purify DNA by using chemical or physical methods from a biological sample separating DNA from protein, cell membranes, and other cellular components. DNA extraction protocol involves lysis of membranes for DNA extraction, then separating DNA from impurities like proteins, and other substances. What is DNA Extraction Principle? DNA extraction involves lysis of cellular and nuclear membranes in order to extract DNA from within. …
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News
PraxiLabs Launches Initiative to Promote Virtual Labs Culture in Egyptian Public Universities.. For Modern Science Teaching
Last Updated on January 23, 2023 by Mostafa In order to realize the State’s plan in Egypt 2030, and based on the vision of the Ministry of Higher Education to support digital transformation of education, PraxiLabs ventures on a new initiative to spread the culture of 3D virtual laboratories and popularize the experience of teaching virtual sciences in Egyptian public universities. The performance of the digital transformation system in Egypt 2022 Dr. Khaled Abdel Ghaffar, Minister of Higher Education and Scientific Research, reviewed a report presented by the Assistant Minister for Digital Transformation on the performance harvest of the digital transformation system, in the fields of higher education and scientific research, and the inclusion of these projects within the ministry’s plan for the year 2023. The report pointed to the ministry’s efforts to provide distinguished digital government services, improve the performance of electronic services in the ministry and its affiliates, and implement several projects, to develop the infrastructure and information in public universities, universities of technology, technical institutes, research centers, automated tests, and e-learning systems, at a total cost of more than 11 billion pounds. PraxiLabs initiative to popularize science education using modern technological techniques Committed to optimally …
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virtual learning articles
Virtual Labs Role in the Future of Higher Education
Last Updated on January 23, 2023 by Mostafa Technologies related to education are going through a period of acceptance and prosperity, especially, during and after the corona pandemic that became part of the regular curriculum. Virtual labs now are one of the most effective educational solutions that are used in higher education and schools to improve the active learning results and student engagement. In this article, we will focus on the virtual labs role in the future of higher education and also the future of schools. Future of Higher Education Higher education leadership and academia are incorporating more virtual lab related options with real-time guidance and feedback. According to a global survey conducted by the World Economic Forum (WEF) on what higher education will look like in 2025, 72 percent of over 27,500 respondents predict that hybrid learning models will be the norm by 2025. Virtual labs stimulate students to use critical thinking by making the decisions in all the steps of the experiment. By learning when and how to take action in an immersive 3D simulation, the experience can help in the future when students need to make a decision in real-life scenarios. This way of learning is …
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