Question

3- the directions for a laboratory activity call for 50 milliliters (ml) of solution a. a student accidentally takes 55 ml from the stock bottle. what should the student do with the extra 5 ml of solution a? * 10 points
return the extra 5 ml to the stock bottle and replace the cap.
pour the extra 5 ml down the drain and rinse the sink with cold water.
dilute the extra 5 ml with 100 ml of water and pour it down the drain.
set the extra 5 ml aside in a labeled beaker and ask the teacher for advice.

Explanation:

In a laboratory, to prevent contamination of the stock solution, extra - taken solution should not be returned to the stock bottle. Pouring chemicals down the drain without proper authorization and knowledge can be hazardous. The best practice is to set aside the extra solution in a labeled container and ask the teacher for guidance as different chemicals have different disposal methods.

Answer:

Set the extra 5 ml aside in a labeled beaker and ask the teacher for advice.