Volumetric flask leak test method? A: Before use, check whether the volume bottle stopper is tight， please put tap water into the bottle near the marking line, cover the stopper, hold the stopper by hand, invert the volume bottle, and observe whether there is water in the bottle mouth. If it does not leak, after
The titration should be made by inserting the tip of the Laboratory Burette into the cone of the cone (or the mouth of the beaker) at 1–2cm. The titration rate should not be too fast. It is suitable for 3–4 drops per second. Flow down and shake the conical flask while dripping. Rotate circumferentially in
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