Question

if an acid is splashed on your skin, wash at once with *
soap
oil
weak base
plenty of water
other:
after completing an experiment, all chemical wastes should be *
left at your lab station for the next class.
disposed of according to your instructors directions.
dumped in the sink
taken home
other

Explanation:

• For the first question: When acid splashes on skin, washing with plenty of water is a common and important first - aid step. Water can dilute the acid and reduce its corrosive effect. Using a weak base may cause an exothermic reaction (if the base is too strong) which can further damage the skin. Soap may not be the best immediate choice as it may not be as effective in quickly diluting the acid as water. Oil will not neutralize or dilute the acid.
• For the second question: Chemical wastes should be disposed of according to the instructor's directions. This is because different chemicals have different proper disposal methods (e.g., some may need to be collected in special containers for hazardous waste disposal). Leaving them at the lab station for the next class is unsafe as they may react with other substances or pose a risk. Dumping in the sink can contaminate water systems (if the chemical is not water - soluble or is hazardous). Taking them home is extremely dangerous as they may be misused or cause harm in a non - lab environment.

Answer:

• First question: plenty of water
• Second question: disposed of according to your instructor’s directions