1. Introduction
The Electric Salt Spoon
Kirin Holdings Spoon and Bowl that enhance the salty taste of low-sodium food by approximately 1.5 times via stimulation. With more Japanese consumers striving to eat healthier, Kirin Holdings has come up with a shockingly unique solution to reduce salt in food without sacrificing taste.
The company's "Electric Salt" line of bowls and spoons, developed with Meiji University, runs a weak current through food that can be controlled by the push of a button. The current's unique waveform draws sodium ions toward the user's taste buds, making the food taste saltier than it actually is.
Ion Racing
Which team of ions will be faster – blue or yellow? An electrode with a positive charge is called an anode because it attracts particles with a negative charge (anions). An electrode with a negative charge is called a cathode as it attracts particles with a positive charge (cations). Therefore, the green strip of the starting material is divided in two – a blue segment consisting of copper cations and a yellow segment consisting of chromate anions. When we change the polarity of the electrodes, we simultaneously switch their charges – and the stripes begin to move in opposite directions. This is how ionic races go!
2. Electrolysis of Molten Ionic Compounds
Electrolysis of Molten Compounds
This video covers an introduction to electrolysis and electrolysis of molten ionic compounds.
3. Electrolysis of Aqueous Solutions of Compounds
Electrolysis of Aqueous Solutions (Part 1)
This video covers the concept of selective discharge as applied to the electrolysis of aqueous solutions.
Electrolysis of Aqueous Solutions (Part 2)
This video covers the concept of selective discharge as applied to the electrolysis of aqueous solutions.
Electrolysis of sodium sulfate
Predict and explain the colour changes we should expect to observe at each electrode.
Simulation – Electrolysis
This simulation will demonstrate the operation of electrolytic cells. The goal is to help you understand electrolysis at the macroscopic and microscopic (atomic/particulate) level, as well as, help you understand quantitative and qualitative aspects of electrolysis. You will be able to manipulate the type of metal electrode, the current applied, and the time, to see how the variables influence the plating of a specific mass of a substance onto the surface of an electrode.
4. Industrial Applications of Electrolysis
How Does Electroplating Work
Learn the basics about electroplating.
The anode is positively charged, and the cathode is negatively charged. They are immersed in a solution called an electrolyte. The electrolyte and the anode are selected based upon the material that you are electroplating with. So if you want to create a copper plate on the cathode, you would use a copper anode and a copper based electrolyte solution.
Purifying Copper
Learn the basics about Purifying copper. What methods and techniques are used in purifying copper? Find out more in this video!
The Beauty of Corrosion
The beautiful anodised aluminum finish on many Apple products keeps them from corrosion, provides a hard and (mostly) scratch resistant surface, and even a beautiful color tint. But have you ever wondered about the process of anodising? To give yourself an edge the next time you're trying to impress someone, watch the short video at the end of this post and learn everything you've ever wanted to know about anodizing aluminum.
5. Simple Cells
Simple Cells
This video covers the principle of simple cells and fuel cells.
Fruit-Power Battery
Voltaic batteries of all shapes and sizes are objects that convert chemical energy into electrical energy. You probably use batteries to power your cell phone, iPod, or any number of wireless gadgets. But did you know that you can actually use chemical energy stored within a lemon to power a small LED light? It's true, and we'll show you exactly how in the Fruit-Power Battery experiment.
Potato-Powered Clock
A simple cell is a device which converts chemical energy into electrical energy. What electrolyte does this simple cell use? What are the reactions that occur at the cathode and the anode? Stay tuned for explanations in class...
Electric Eels
Differences in ion concentrations, mainly sodium and potassium ions, in special cells called electrocytes produce an emf on the order of 0.1 V. By connecting thousands of these cells in series these South American fish are able to generate short electric pulses as high as 500 V!
The History of the Lithium Ion Battery
This video links many chemistry ideas you have learnt, such as ionic bonding, graphite structure, redox reactions, alkali metals, and transition metals. It also shows how scientific progress is shaped by real-world factors like war, resources, and economic demand. In particular, it raises important issues about mining and the finite supply of metals.
Simulation – Galvanic/Voltaic Cells
In this activity, students will use a simulation to create a variety of galvanic/voltaic cells with different electrodes. They will record the cell potential from the voltmeter and will use their data to determine the reduction potential of each half reaction. Students will also identify anodes and cathodes, write half reaction equations and full chemical equations, and view what is happening in each half cell and the salt bridge on a molecular scale.
How does a fuel cell work?
Fuel cells may be a major energy source of the future, but how do they work? In the latest Naked Science Scrapbook, we find out how to generate electricity from hydrogen, how fuel cells helped man to get to the moon, and how you could use one to heat your water at home
