What is the use of stopcock in burette?
At the tip of burette, there are a stopcock and valve to control the flow of the chemical solution. The barrel of the stopcock can be made of glass or the plastic PTFE. Stopcocks with glass barrels need to be lubricated with vaseline or a specialized grease.
What is PTFE burette?
Unit price(PTFE burette, 25ml): US $ 6.4/ Piece. Burette (Volumetric burette, buret) is a volumetric measuring laboratory glassware which is used in analytical chemistry for accurate dispensing of variable, and for measuring the volume of a liquid, especially of one of the reagents in a titration.
What is a glass stopcock?
Ground glass stopcocks have a glass plug with a hole or holes through it, allowing closure or opening with a half turn of the plug. There are stopcocks in the same form as above that feature Teflon plugs. This allows for sealing without grease, and are probably the most common kind.
What is a glass burette?
burette, also spelled buret, laboratory apparatus used in quantitative chemical analysis to measure the volume of a liquid or a gas. It consists of a graduated glass tube with a stopcock (turning plug, or spigot) at one end.
What are burettes used for?
A burette is used to dispense small volumes of liquid called aliquots, or sometimes gas, with high accuracy. It consists of a long glass tube with a valve at one end to control the flow of liquid. Burettes serve essentially the same purpose as a pipette.
How long is a 50mL burette?
This quality glass burette has a 50 ml capacity with 0.1 ml divisions. It has a tolerance of +/- 0.1 ml. It is made from borosilicate glass and features a PTFE (Teflon) stopcock for ease of use. The overall height is 75 cm, and the tube is about 15 mm in diameter.
What does a burette look like?
What is purpose of using burette?
What is acid burette?
Acid-base titrations are used to determine the concentration of a sample of acid or base and are carried out using a piece of equipment called a burette. It is a long, glass tube with a tap at the end which can be used to very carefully add drops of liquid to a test solution.
How much does burette cost?
Laboratory Burette at Rs 200/piece | Laboratory Burette | ID: 12694490288.