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Clue by Clue Anion Detection Adventure in the Lab
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=cTAd2qoRxUM
📢 Receive Comprehensive Mathematics Practice Papers Weekly for FREE 😊 • Click this link to get: ▶️▶️▶️ https://iitutor.com/email-list/ ◀️◀️◀️ • 🔬 Step into the fascinating world of chemistry as we embark on a thrilling lab adventure! In this exciting video, we'll take you through the intricate process of identifying anions and cations, one clue at a time. • 🧪 Anion Mixtures: Get ready to unravel the mysteries hidden within chemical solutions. We assume that a wide range of anions may be present, and to confirm their identities, we follow a series of carefully crafted tests. Watch closely as we: • 1️⃣ Use dilute nitric acid and gentle heat to reveal the presence of carbonate ions with bubbles. • 2️⃣ Introduce dilute barium nitrate to the acidic solution from step one, causing a white precipitate to emerge and confirm the presence of sulfate ions. • 3️⃣ . Take you through the filtration process to separate the mix and then add silver nitrate solution to the acidic filtrate, unveiling the presence of chloride ions with a distinctive white precipitate. • 4️⃣ Create an alkaline environment (pH 9) using ammonia and introduce barium nitrate solution. Witness a white precipitate forming, confirming the existence of phosphate ions. Further, we'll double-check with a fresh sample and silver nitrate solution, where yellow is undeniable proof of phosphate presence. • 🌟 Cation Mixtures: But our adventure doesn't stop there! Let's also explore the realm of cations. Assuming various cations are present, we follow a precise sequence of tests to unlock the secrets of their presence: • 1️⃣ By adding hydrochloric acid, we unveil a white precipitate, signalling the presence of lead ions. We'll even confirm it by introducing sodium iodide for an intense yellow precipitate, leaving no room for doubt. • 2️⃣ Filtering any precipitate from the first step, we perform a sulfuric acid test on the filtrate, discovering barium and/or calcium ions. Distinguishing between them, we use a sodium fluoride solution and a flame test for further clarification. • 3️⃣ Lastly, the adventure takes an exciting turn as we add sodium hydroxide solution to the filtrate from step one. Watch a blue precipitate appear, indicating the presence of copper ions, or a yellow-brown precipitate, suggesting the existence of iron ions. We'll even confirm the copper presence with a flame test and explore a distinguishing test with KSCN for that captivating red colour, confirming the presence of iron (III) ions. • Join us on this immersive lab adventure, where every chemical reaction tells a story, and every precipitate holds a clue. Whether you're a chemistry enthusiast or just curious about the world of ions, this video will captivate and inform you. Don't miss out on this captivating journey through the world of anions and cations! 🔍🧬💡 • Anion mixtures • Let's assume that all the anions discussed above may be present in a solution. To confirm that some or all are present, the tests must be conducted in the following order: • (1) Add dilute nitric acid and warm. Bubbles indicate carbonate. • (2) Add dilute barium nitrate to the acidic solution from (1). A white precipitate indicates sulfate. • (3) Filter the acidic solution from (2). Add silver nitrate solution to the acidic filtrate. A white precipitate indicates chloride. • (4) Filter the mixture from (3). Make the filtrate alkaline (pH 9) with ammonia. Add barium nitrate solution. A white precipitate indicates phosphate. Confirm by testing a fresh sample with silver nitrate solution. A yellow colour confirms phosphate. • Cation mixtures • Let's assume that all cations may be present in the solution. To confirm that some or all are present, the tests must be conducted in the following order: • (1) Add hydrochloric acid. A white precipitate indicates lead. • Confirmation: Add sodium iodide to a fresh sample. An intense yellow precipitate confirms lead. • (2) Filter any precipitate from (1) and test filtrate with sulfuric acid. A white precipitate indicates barium and/or calcium. • Distinguishing test: To a fresh sample add sodium fluoride solution. A white precipitate indicates calcium; no precipitate indicates barium. Use a flame test to help distinguish between calcium and barium. • (3) To the filtrate from (1) add sodium hydroxide solution. A blue precipitate indicates copper. A yellow—brown precipitate indicates iron. Confirm copper using a flame test. • Distinguishing test: Test filtrate from (1) with KSCN. A red colour indicates iron (III).
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