0
What process causes iodine vapor to collect in a flask of solid iodine?
Wiki User
∙ 12y ago
Procrastinator, you should have started your Enrichment earlier.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
What is the use of iodine flask?
An Iodine Flask is essential an Erlenmeyer Flask with a stopper used for the wet chemical analysis "Iodine Determination" . This analysis is typically performed on fatty acids, oils and shellac varnishes.
How do you obtain powdered iodine from liquid iodine?
Put the iodine tincture in a shallow glass dish; let it evaporate at room temperature; what's left behind is a thin film of crystalline iodine that you can scrape off - note: iodine like chlorine is very reactive; that's why it's used as a germicide - were you to put a candle under the dish you would see the iodine sublimate (go directly from a solid to a brownish gas). Iodine does not come in a powder form, but you can get USP (United Stated Pharmaceutical Grade) Iodine crystals at any pharmacy with a doctor's prescription.
What is Iodine value for Activated Carbon?
Iodine Value of Activated Carbon Apparatus: Volumetric flask, conical flask, beaker, burette, pipette, filter paper Reagents: * 0.1N Iodine solution ( 40 gm KI in 1 Ltr of Distilled water ). * 0.05N Sodium Thiosulphate solution (12.5 gm Na2S2O3.5H2O in 1 Ltr Distilled water) * 1% Starch solution * Activated carbon Procedure: I Standardisation of Iodine solution * Take 10c.c of 0.1N Iodine solution in conical flask. * Add 2 drops of Starch solution. * The pale yellow colour of Iodine Soln turns Blue. * Titrate with 0.05 N Sodium Thiosulphate till it becomes Colourless. * Burette reading corresponds to blank reading.(B) II * Weigh very accurately 0.2 gm of Activated carbon * Introduce it into the Iodine flask which should be completely dry * Add 40cc of 0.1N Iodine solution * Shake the flask for 4 minutes and filter it * Collect the filterate in a dry flask and Titrate 10cc of the filtrate against Standard Sodium thiosulphate solution using starch as indicator * Burette reading corresponds to (A) Calculations: Iodine value: C x Conversion factor; mg/gm Factor:Mol wt. of iodine (127) x normality of iodine x 40 / Wt. of carbon x Blank reading C=B-A This is dry basis test From Ishan Udyog Bhilai
Preparation of 0.1n iodine solution?
According to Kodak: For a 0.1 Normal (0.1N) solution of iodine (I2), in 1 L volume flask, dissolve 40 g potassium iodide in 25 mL water. Next, add 12.7 g iodine (I2) and dilute to 1 L. Note that a 0.1N solution is not the same as a 0.1M solution. For iodine 0.1N is 0.05M.
What happens when you mix red phosphorus Iodine crystals and ephedrine?
You get meth in about 40 minutes. Throw it all on one flask and let it sit for a while shake the flask it if starts to bubble up too much. Then when it calms down heat it to about 180f until it doesnt look like anything else is happening.
What is the use of iodine flask?
An Iodine Flask is essential an Erlenmeyer Flask with a stopper used for the wet chemical analysis "Iodine Determination" . This analysis is typically performed on fatty acids, oils and shellac varnishes.
What is an filtering flask?
This flask is used to collect the filtrate from the filter.
What is the use of the filterring flask?
The filtering flask is used to collect the solution resulted from a filtration.
How do you obtain powdered iodine from liquid iodine?
Put the iodine tincture in a shallow glass dish; let it evaporate at room temperature; what's left behind is a thin film of crystalline iodine that you can scrape off - note: iodine like chlorine is very reactive; that's why it's used as a germicide - were you to put a candle under the dish you would see the iodine sublimate (go directly from a solid to a brownish gas). Iodine does not come in a powder form, but you can get USP (United Stated Pharmaceutical Grade) Iodine crystals at any pharmacy with a doctor's prescription.
What is Iodine value for Activated Carbon?
Iodine Value of Activated Carbon Apparatus: Volumetric flask, conical flask, beaker, burette, pipette, filter paper Reagents: * 0.1N Iodine solution ( 40 gm KI in 1 Ltr of Distilled water ). * 0.05N Sodium Thiosulphate solution (12.5 gm Na2S2O3.5H2O in 1 Ltr Distilled water) * 1% Starch solution * Activated carbon Procedure: I Standardisation of Iodine solution * Take 10c.c of 0.1N Iodine solution in conical flask. * Add 2 drops of Starch solution. * The pale yellow colour of Iodine Soln turns Blue. * Titrate with 0.05 N Sodium Thiosulphate till it becomes Colourless. * Burette reading corresponds to blank reading.(B) II * Weigh very accurately 0.2 gm of Activated carbon * Introduce it into the Iodine flask which should be completely dry * Add 40cc of 0.1N Iodine solution * Shake the flask for 4 minutes and filter it * Collect the filterate in a dry flask and Titrate 10cc of the filtrate against Standard Sodium thiosulphate solution using starch as indicator * Burette reading corresponds to (A) Calculations: Iodine value: C x Conversion factor; mg/gm Factor:Mol wt. of iodine (127) x normality of iodine x 40 / Wt. of carbon x Blank reading C=B-A This is dry basis test From Ishan Udyog Bhilai
How do you get pure dry iodine from a mixture of iodine and sand.?
Well every school kid knows about the 'cold finger' separation technique. Iodine changes from a solid straight to a gas when heated. It sublimes. So heat the sand/iodine mixture in a pyrex tube or flask which has a 'cold finger' inserted. The hot iodine gas will rise, hit the cold finger and form pure solid iodine crystals on the cold finger. Collect from the finger. This really is bog standard school kid chemistry.
Why were the contents of the flask filtered?
You can use any type of bottle to collect the filtrate.
What does collect on mean in chemistry?
collect: gather such as water droplets colllected on the flask as the water evaporated. This represents a physical change rather than a chemical change.
What causes contraction porosity in dentistry?
Insufficient pressure on the flask during processing causes porosity in denture.
What is laboratory Erlenmeyer flask?
Erlenmeyer flask is a conical flask made from glass or plastic, uset to make chemical reactions, volumetric titrations, to collect fluids from filtration, distillation, etc. Some times these flaks are graduated.
Do you use titrant in conical flask?
yes we use titrant in the conical flask ,this is because titrant is a solution we use in burrete for titration in this process we titrant the solution in the conical flask along with an indicator
What is a Erlenmeyer cylinder?
This is a conical flask from glass or plastic, frequently used in all chemical laboratories; the Erlenmeyer flask may contain reagents, collect filtrates, labware for a chemical reaction, it is used for titration, etc. It is not a cylinder.
