Table of Contents
- 1 How do you pick up a reagent bottle?
- 2 What is the correct procedure for removing a solid reagent from its container in preparation for use in an experiment?
- 3 What would u use to remove solid chemicals from a reagent bottle?
- 4 What is the use of reagent bottle in laboratory?
- 5 Why is it important to replace caps on all solvent and reagent bottles immediately after obtaining your portion?
- 6 How are solid reagents transferred to an experiment?
- 7 How to avoid spilling liquid down the outside of a beaker?
How do you pick up a reagent bottle?
- Read label at least 3 times before use.
- Grasp stopper in between 2 fingers.
- Pick up bottle making sure the label is toward the palm of your hand.
- Use a stirring rod to avoid drips and spills when pouring liquid into a beaker.
- If handling a bottle of acid, extra precaution should be taken. (
When transferring chemical from reagent bottles How do you prevent contamination when removing the covers?
Once removed from the bottle or glass, cork stoppers must be placed on a clean surface (e.g. a watch glass or other suitable equipment) with the opening facing down. This is to avoid contamination of the compound and unnecessary exposure.
What is the correct procedure for removing a solid reagent from its container in preparation for use in an experiment?
Always use a spatula or scoopula to remove a solid reagent from a con- tainer. Do not directly touch any chemical with your hands. Never use a metal spatula when working with peroxides.
Why should the spatula be clean and dry?
Answer: The spatula used for spooning solid chemicals from a reagent bottle should be clean and dry to avoid contamination of reagents. Explanation: Regular cleaning of spatula helps avoiding any unnecessary particle to react with the reagent like, dust, mites, moisture etc.
What would u use to remove solid chemicals from a reagent bottle?
Never put your spatula to remove solid chemicals from a bottle. If you do so, you will be contaminating the chemical. Instead, pour solid directly into your container by tilting the bottle and rotating it to control the amount dispensed.
Why is a spatula called a spatula?
Spatulas come in many different shapes and sizes. The etymology of the word “spatula” goes way back to ancient Greek and Latin. Linguists agree that the basic root of the word comes from variations on the Greek word “spathe.” In its original context, spathe referred to a broad blade, like those found on a sword.
What is the use of reagent bottle in laboratory?
Reagent bottles, also known as media bottles or graduated bottles, are containers made of glass, plastic, borosilicate or related substances, and topped by special caps or stoppers. They are intended to contain chemicals in liquid or powder form for laboratories and stored in cabinets or on shelves.
Why should you never excess chemicals in the reagent bottle?
Never return unused chemicals to the reagent bottles. This is a source of possible contamination of the entire contents of the stock bottle. Dispose of unused chemicals exactly as instructed in the waste disposal instructions for that substance, identified by throughout each experiment.
Why is it important to replace caps on all solvent and reagent bottles immediately after obtaining your portion?
Take great care to avoid contaminating reagents. Always replacing bottle tops as soon as you have finished dispensing reagents since many compounds react with moisture in the air, with oxygen or with carbon dioxide. Others are volatile and evaporate.
Why is spatula used for spooning solid chemical from a reagent bottle?
If each person put a dirty spatula in the bottle, the reagent bottle would very quickly accumulate all kinds of junk, ruining the chemicals inside or causing hazardous chemical reactions. Q: Why should the spatula used for spooning solid chemical from a reagent bottle be clean and dry?
How are solid reagents transferred to an experiment?
Solid reagents should be transferred to a smaller container with a spatula for use in an experiment. They should be weighed on weighing paper, then rolled inside the paper to be transferred to the beaker or test tube used in the experiment.
Do you take reagent back to supply bench?
Never move a reagent bottle to your bench. Leave the bottle at its designated area on the supply bench. Take your own container to the reagent bench to dispense the necessary amount of reagent that you will take back to your lab bench.
How to avoid spilling liquid down the outside of a beaker?
Avoid spilling liquid down the outside of a beaker by holding a glass stirring rod against the lip of beaker. Filtration the separation of solid particles from a liquid by pouring the mixture through a filter filtrate the solution which has passed through a filter ~Set up the burner and obtain a striker.