Concerning the disposal of materials at the end of the experiment, which methods are safe? Check all that apply.

Dispose of pH paper in the trash, and the cabbage indicator solution can be poured down the drain. Acids and bases should not simply be dumped into the drain to mix with sewer water; ask the teacher to neutralize them and handle their disposal safely. Therefore, the safe methods are disposing of the pH paper in the trash, draining the indicator solution, and having the teacher neutralize the acids and bases.

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