Volumetric Flasks 1000ml Grade B Pack of 2
Volumetric Flasks 1000ml Grade B Pack of 2
Student's name
First and last name, and class if you know it. This goes on the pack label.
Pickup available at Mega DC – Tweed Heads South
Usually ready in 24 hours
Two litre-size volumetric flasks, tolerance plus or minus 0.80ml
1000ml Grade B borosilicate volumetric flasks with polyethylene stoppers. Pack of 2 for $60.00.
A volumetric flask does one job precisely: it holds exactly the stated volume when filled to the line. That is what standard solutions and accurate dilutions need, and it is why a beaker or a measuring cylinder will not do.
Tolerance is plus or minus 0.80ml on 1000ml - Grade B, which is the standard grade for school and general laboratory work. It is calibrated to contain 1000ml at 20 degrees C.
Never heat one. The supplier is explicit: volumetric flasks must not go on a hotplate or over a bunsen. Heating changes the glass volume and the calibration goes with it. Dishwashers and autoclaving at 121 degrees C are fine and do not affect accuracy.
The stoppers are chemical-resistant polyethylene to DIN 12664 with a 24/29 socket. Read the meniscus with the flask vertical and the line at eye level - parallax is the biggest source of error in practice, well ahead of the flask itself.