PDF Publication Title:
Text from PDF Page: 002
Procedure • 162 HEALTH & SAFETY: The products produced by this reaction are all more hazardous than the reactants. Hydrogen is Extremely flammable, chlorine is Toxic and Dangerous for the environment, and sodium hydroxide is Corrosive. Ensure that the current is turned off a soon as a trace of chlorine is detected. Chlorine (Toxic, Dangerous for the environment) can be a problem for asthmatic pupils. If the directions in the procedure notes are followed then very little chlorine is produced. Sodium hydroxide is Corrosive. Ensure that students wear eye protection, especially when they are clearing up the experiment. a Put about 75 cm3 distilled water into the beaker. Add about 2 heaped spatulas of sodium chloride. b Stir until the salt dissolves. Then add several drops of Universal Indicator solution. Stir to mix thoroughly. You need enough indicator to give the water a reasonable depth of green colour. c Pour coloured salt solution into the U-shaped test tube and clamp it as shown in the diagram. – power supply + set to 10V electrical leads with crocodile clips electrode holder graphite electrode clamp u-tube solution of salt and Universal indicator d Wash the carbon electrodes carefully in distilled water and then fix them so that there is about 3 cm of electrode in each side of the U-tube – see diagram. This is most easily done using electrode holders. e Attach leads and connect to a power pack set to 10 V. f Turn on the power pack and observe closely what happens. A piece of white paper held behind the U-tube can help. Make sure the U-tube is kept very still during the experiment. g Turn off the power as soon as you notice any change at the positive electrode, or when you smell a ‘bleachy, swimming pool’ smell. This will probably take less than 5 minutes.PDF Image | Colourful electrolysis 54
PDF Search Title:
Colourful electrolysis 54Original File Name Searched:
Colourful-electrolysis.pdfDIY PDF Search: Google It | Yahoo | Bing
Salgenx Redox Flow Battery Technology: Power up your energy storage game with Salgenx Salt Water Battery. With its advanced technology, the flow battery provides reliable, scalable, and sustainable energy storage for utility-scale projects. Upgrade to a Salgenx flow battery today and take control of your energy future.
| CONTACT TEL: 608-238-6001 Email: greg@salgenx.com | RSS | AMP |