Should You Pour Acids and Bases Over a Sink in a Lab?

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Discussion Overview

The discussion revolves around the safety practices in a laboratory setting, specifically regarding the disposal of acids and bases. Participants explore the implications of pouring these substances over a sink, the context of laboratory safety, and the nuances of handling chemicals.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant suggests that pouring acids and bases over a sink is not advisable, indicating a belief that it should be avoided in laboratory practices.
  • Another participant argues that while it is generally discouraged to pour excess chemicals into the sink, there may be exceptions for weak acids or bases, suggesting a need for clarification from instructors.
  • A different viewpoint highlights that common household practices, such as using drain cleaners, involve strong acids or bases, which complicates the strict rules about disposal.
  • One participant agrees with a previous comment, emphasizing that the phrasing of the question does not explicitly state that acids and bases should be disposed of in the sink, implying that context matters.
  • Another participant provides a perspective that pouring over a sink may be practical during transfers to minimize spills, suggesting that the term "pouring over" could imply a different action than "disposing into."

Areas of Agreement / Disagreement

Participants express differing views on the appropriateness of pouring acids and bases over a sink, with no consensus reached on the best practice. Some advocate for caution, while others suggest that context can dictate acceptable practices.

Contextual Notes

The discussion highlights the ambiguity in safety practices regarding chemical disposal and the need for specific guidelines that may vary by institution or situation.

TT0
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Homework Statement


Which of the following would you not do in a laboratory setting?

I. Pour acids and bases over a sink
II. Wear goggles
III. Heat a stoppered test tube

(A) I only
(B) II only
(C) III only
(D) I and III only
(E) I, II, and III

Homework Equations


-

The Attempt at a Solution


I chose D but apparently it is C. I thought you shouldn't pour acids and bases over sinks, can someone clarify? (I have seen this multiple times)

Thanks!
 
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i would still say its D because it is never a practice to pour excess chemical into the sink (at least when i was in college). Weak Acid or Base maybe are permitted by some school? Better refer to your teacher and ask him/her the reason.
 
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Drain cleaners contain either strong base (NaOH) or strong acid (H2SO4), and they are routinely used throughout the world in millions of households. While the general idea that you should not get rid of excess chemicals by pouring them into the sink is definitely right, such simple rules sometimes become blatantly absurd when compared with the reality.
 
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Agree with Borek.
It does not say, "dispose of acids and bases into the sink."

TT0 said:
I. Pour acids and bases over a sink
which certain situations and necessity will dictate.
 
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TT0 said:
I. Pour acids and bases over a sink
My take on this question is when transferring from a container to a smaller one, should it be performed over a sink to catch any spill. Otherwise, you'll be cleaning up the spill off the bench and other apparatus (and possibly the floor and yourself).

Pouring "over" in this context can have a meaning quite different from "into".
 
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