i just need to know each indivually
the exact question is
What is the correct procedure for removing a sold reagent fromm its container in prepartion for use in an experiment? (and the same for liquid) Thanks!
2006-09-05 16:03:50 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Simple 4 step process for each.
Handling Solid Reagents
When massing a reagent use a weigh boat that has been counterbalanced by rezeroing the scale after the weigh boat is on it.
Remove the cap form the bottle and place it face up on the counter to avoid picking up contaminants from the table and to avoid depositing the chemical on the table.
Use a clean spatula to take the reagent from the bottle to the weigh boat. If you take more than you need, use the spatula to take the reagent back out of the weigh boat and put it back into the bottle. Do not, however, replace reagents that have been taken back to your table because this could cause contamination.
Be sure to recap the bottle after you have finished using it. Bottles left open can be contaminated or spilled easily.
Handling of Liquid Reagents
When using a penny stopper, place it between two fingers and remove it.
Keep the stopper help in your hand between your fingers. Setting it down on the table could cause both the chemical to become contaminated and also leave the liquid on the table.
Use an eyedropper to take what you need from the bottle and put it into a graduated cylinder for measuring. Using an eyedropper will prevent spilling and help you to control the amount of liquid you are taking more precisely.
Pour the liquid from the graduated cylinder down a glass stirring rod to help control the flow and prevent spillage and splashing.
2006-09-05 16:14:31 · answer #1 · answered by †ђ!ηK †αηK² 6 · 0⤊ 0⤋
Reagent Container
2016-12-13 06:12:41 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Sand is made of multiple small debris. The debris, the guy sand grains, are sturdy. on the different hand, drinks are a factor of remember wherein the guy molecules or atoms of a substance are waiting to slip previous one yet another. Sand grains are plenty greater suitable than the guy atoms and molecules from which they are made. hence, in spite of the fact the grains are waiting to pass around one yet another this is not a liquid.
2016-12-14 18:57:48 · answer #3 · answered by ? 4 · 0⤊ 0⤋
may be filtration
2006-09-05 16:12:19 · answer #4 · answered by Anonymous · 0⤊ 0⤋