Distinguish between the differences between the two. Specifically, as follows:
Ⅰ The use of the two is different:
1. The use of narrow mouthed bottles: glass containers used to store liquid reagents.
2. The use of droppers: When the amount of liquid chemical used each time is small, or when danger is likely to occur, droppers are often used to contain the solution. Usually, liquid acid-base indicators are used in droppers.
Ⅱ The bottle caps of the two are different:
1. The cap of a fine mouthed bottle: glass bottle stopper.
2. Bottle cap of dropper: rubber dropper.
Ⅲ The usage precautions for the two are different:
1. Precautions for using fine mouthed bottles:
(1) Cannot be used for heating.
(2) When taking reagents, the bottle stopper should be placed upside down on the table, and after use, the stopper should be tightened and sealed if necessary. Due to the frosted inner side of the bottle mouth, which is matched with a frosted glass stopper, it cannot hold strong alkaline reagents. If storing alkaline reagents, use rubber stoppers instead.
(3) When placing, the label should be placed outward.
(4) When pouring, the label should flush into the palm of the hand to prevent the residual liquid from flowing down and corroding the label.
(5) When removing the bottle stopper, it should be placed upside down on the table.
2. Precautions for using droppers:
(1) The dropper on the dropper is used in conjunction with the dropper.
(2) Do not rinse the dropper on the dropper with water.
(3) Do not store strong alkali (glass stopper) for a long time, and do not store strong oxidants for a long time.
(4) The remaining medication that has been sucked cannot be poured back.
(5) The dropper should not be placed upside down or horizontally to prevent the reagent from corroding the dropper.
(6) When dripping, the dropper should not be placed in the container to avoid contaminating the dropper and damaging the container.
(7) The dropper cannot be placed flat or inverted to prevent liquid from flowing into the glue head.
(8) Use cork or rubber stoppers when storing alkaline solutions.
Note: After removing the rubber cap from the dropper and the stopper from the fine mouthed bottle, the inside of the dropper bottle mouth should be frosted, similar to the fine mouthed bottle.