Luminol fountain - Exhibition Chemistry assignment help
Declan Fleming displays you how to capture your students' imaginations along with spectacular demonstrations.
The chemiluminescence of luminol is a popular demonstration. Students actually enjoy experiencing the eerie 'cold light' free from the reaction. This is frequent shown through pouring one liquid within another, either directly, or through a coiled length of transparent tubing as explained within a previous Exhibition Chemistry.1 This reaction could be displayed even more dramatically through using a fountain apparatus to mix the liquids. The primary environment of the ammonia fountain lends itself well to the luminol reaction, that works best at high pH.
Kit
1. 0.5-2 dm3 round bottomed flask
2. 2 conical flasks (at least 0.5 dm3)
3. 20 cm3 plastic syringe
4. Delivery tubes (see diagram2)
5. Drying tube (optional)
6. 0.4 g luminol (3-aminophthalhydrazide)
7. 100 cm3 NaClO(aq) use either thin household bleach (around 5% NaClO solution, not H2O2) (irritant), or 50 cm3 commercially available NaClO solution (corrosive)
8. 4 g NaOH pellets
9. 10 cm3 concentrated (880) NH3(l) (corrosive, ammonia gas is toxic)
10. 10 g KOH pellets (corrosive)
Preparation
There are a number of ways to get ready luminol solutions. The idea for this expression came from the Salters Chemistry Club resources2 but I've establish it works better with the recipe suggested within Classic Chemistry Demonstrations (CCD).3 It will work using the recipe suggested before in Education in Chemistry assignment help 1 and the glow lasts longer, but which recipe will take longer to get ready and this one works well.
For the luminol solutions
In one 1 dm3 flask, dilute 100 cm3 of household bleach (or 50 cm3 of commercial NaClO solution) along with 900 (or 950) cm3 of water.
In other flask dissolve 4 g of NaOH and 0.4 g of luminol in 1 dm3 water. This mixture will be sluggish to dissolve so prepare at least 1 hour ahead of time. These solutions are fairly stable and although some sources recommend using the solutions within 12 hours, I've found them to still work after some months in the store cupboard.
The chemiluminescence of luminol is a popular demonstration. Students actually enjoy experiencing the eerie 'cold light' free from the reaction. This is frequent shown through pouring one liquid within another, either directly, or through a coiled length of transparent tubing as explained within a previous Exhibition Chemistry.1 This reaction could be displayed even more dramatically through using a fountain apparatus to mix the liquids. The primary environment of the ammonia fountain lends itself well to the luminol reaction, that works best at high pH.
Kit
1. 0.5-2 dm3 round bottomed flask
2. 2 conical flasks (at least 0.5 dm3)
3. 20 cm3 plastic syringe
4. Delivery tubes (see diagram2)
5. Drying tube (optional)
6. 0.4 g luminol (3-aminophthalhydrazide)
7. 100 cm3 NaClO(aq) use either thin household bleach (around 5% NaClO solution, not H2O2) (irritant), or 50 cm3 commercially available NaClO solution (corrosive)
8. 4 g NaOH pellets
9. 10 cm3 concentrated (880) NH3(l) (corrosive, ammonia gas is toxic)
10. 10 g KOH pellets (corrosive)
Preparation
There are a number of ways to get ready luminol solutions. The idea for this expression came from the Salters Chemistry Club resources2 but I've establish it works better with the recipe suggested within Classic Chemistry Demonstrations (CCD).3 It will work using the recipe suggested before in Education in Chemistry assignment help 1 and the glow lasts longer, but which recipe will take longer to get ready and this one works well.
For the luminol solutions
In one 1 dm3 flask, dilute 100 cm3 of household bleach (or 50 cm3 of commercial NaClO solution) along with 900 (or 950) cm3 of water.
In other flask dissolve 4 g of NaOH and 0.4 g of luminol in 1 dm3 water. This mixture will be sluggish to dissolve so prepare at least 1 hour ahead of time. These solutions are fairly stable and although some sources recommend using the solutions within 12 hours, I've found them to still work after some months in the store cupboard.
Advertise on APSense
This advertising space is available.
Post Your Ad Here
Post Your Ad Here
Comments