Waste disposal

While experimenting…

…with a substance, you will have a solution-filled jelly jar, and possibly a second jar with moist crystals to be redissolved, at your work place.

Note: All filled jars should have a label marked with the jar’s contents.

If you have concluded all the experiments with a chemical and you are pleased with your crystals, you should only save the leftover substance in a solid state. To do that, let the jars stand open for a few weeks in a warm, out-of-theway location. Cover them with a thin piece of cloth (a cloth handkerchief, for example) fastened over the top of the jar with a rubber band. This will prevent dust and insects from falling in.

Make absolutely sure that young children and pets cannot get to the chemicals!

Every couple days, check the jars and push any crystals back down into the jar. Once the contents are finally dry, you can return them to their containers in the experiment kit.

You can save your alum crystals and other trinkets in the treasure chest, which you can then lock with the screw.

TIP! To lock the treasure chest, first push the nut into the lock from below. Then rotate the screw into the nut and tighten it with a screwdriver.

Waste…

…will be created in the course of your experiments. You will have chemicals left over. You can rinse them down the drain with plenty of water if you don’t want to collect and reuse them later on.

Ideally, though, you should collect all the leftover chemicals in a closed, clearly labeled container, which you should keep safely out of the way, and eventually throw away in the household garbage. These leftover chemicals can be mixed together without any danger.