Volumetric flask

There are many instances in today’s society and on this planet, where it is crucial to figure out the unknown concentration of a known substance. The process that is used to figure out the unknown concentration of a substance is the process known as titration. Titrations are used in a wide range of work environments including forensic labs, and pharmaceuticals. A way in which titrations could aide society could start in a forensic lab. It could be used when trying to figure out the…

16, 2014 repairing a damaged painting on canvas can be a trying experience. There are several repairs that you can do by yourself without having to consult an expert. You can bows in places on the canvas, repair small tears or holes and replacing broken stretcher strips without a lot of problems. 1 .Repair any bows in the canvas. A canvas can get bows in the fabric when it has been stored. If anything leans up against the canvas, it can push an impression into the fabric. This is the easiest…

Salcha-1 was incubated in six Erlenmeyer flasks (1L) containing 200mL of Potato Dextrose Broth (10g/L Great Value mashed potatoes with 5g/L D-glucose). One of the five flasks received approximately 1.0-1.3g of the following metal compounds: cobalt (II) chloride hexahydrate, cobalt (II) nitrate hexahydrate, cobalt (II) thiocyanate, erbium chloride hexahydrate, or palladium (II) acetate. The sixth flask was reserved as a control and only contained PDB. Salcha-1 was incubated on an Innova 5000…

Moldovan et al. propounded a different method of extraction from pharmaceutical tablets by extraction of with 0.5 M NaOH. Samples were then filtered and transferred to calibrated flasks with double quantity of distilled water [25]. Author selected five Daflon tablets (a mixture of micronized flavonoid glycosides consisting of 450 mg of diosmin and flavonoid extract equivalent to 50 mg of hesperidin) were powdered, and sonicated at 30°C with 90 mL of methanol/DMSO (1:1) for 30 min. A…

Prepared by: Ahmed Alrahmani Prepared to: Dr. Maohong Fan Subject: Heat Transfer from Steam to Water Date: 11/01/2013 Summary: The objective of this experiment was to investigate the overall heat transfer ( Uₒ ) for the external heat exchanger at two different water circulation rates by using two methods “ Heating Liquids in Tank Storage ” and “ Corning Heat Exchanger “ . Briefly, the measurements were done by changing the volume flow rate between 40 lbm/min and 70 lbm/min for the first…

onto the weighing paper. Then, 50 mL of deionized water was measured with a graduated cylinder, and was added to a beaker, followed by the salt. The solution was stirred by using a stirring rod. The salt water was then carefully poured into the volumetric flask.…

bleach by added DI water (deionized water) till the indicated mark. Make sure to invert the volumetric flask at least ten times this will insure that the solution is fully mixed. Weight out approximately 1g solid KI. Use a pipet to obtain and transfer 25mL of diluted bleach into an Erlenmeyer Flask, also add the solid KI and about 25 mL of DI water. Swirl the flask to make sure the KI is dissolved. Take your flask to the fume hood and add approximately 2mL of the 3M HCl, the solution should turn…

Interpretation and Evaluation: Rinsing Process: When performing a volumetric analysis all equipment to be used must be washed with deionised water. This is done in order to remove anything that contaminate your solution and have an effect on the results. It is important that deionised water is used and not regular tap water, this is because tap water could itself contains many unwanted impurities such salts, other solids and bacteria. If these were to contaminate the solutions to be used it…

Apparatus / Materials Plastic Tray Electronic scales Sodium hydroxide Volumetric flask and lid Glass funnel Distilled water Pipette Volumetric pipette/s (5mL, 20mL) Bulb Conical flask Retort Stand Burette Burette clamp White Tile Method Place the plastic tray on the electronic scales and press tare to set the wither to zero; Weigh out 0.7993g of Sodium hydroxide in the plastic tray on electronic scales; Rinse a 200ml Volumetric Flask with distilled water; Rinse a glass funnel with…

shaped, volumetric and Erlenmeyer flasks are closed-end air columns, and they abide by the conventional rules of resonance. When a rubber stopper is inserted into a flask some air is forced out of the flask, and the stopper seals the flask so the air cannot get back in. This creates an area of low pressure within the flask. When the stopper is quickly pulled out of the flask, the air rushes back into the flask because the pressure of the atmosphere is higher than the pressure inside the flask.…