Dispose of unused chemicals according to your teacher's instructions.
it depends on what the experiment was and what chemicals were used
make an experiment!
throw it out
After my opinion it is not recommended in laboratory.
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because it will contaminate the liguid/solution inside the bottle..tha's why you should always throw excess liquid solution. the contaminated chemical that is used could also cause a chemical reaction therefore having a high explosion risk.
reuptake
Chemicals have made many things easier.
If unused chemicals are not poured back into their containers, they will be wasted. Also, they could be dangerous and should not be left lying around.
After my opinion it is not recommended in laboratory.
processing film chemicals used /unused
Amang (02W)Bebeng (1101)Chedeng (1102)Dodong (1103)Egay (1104)Falcon (1105)Goring (active)Hanna (unused)Ineng (unused)Juaning (unused)Kabayan (unused)Lando (unused)Mina (unused)Nonoy (unused)Onyok (unused)Pedring (unused)Quiel (unused)Ramon (unused)Sendong (unused)Tisoy (unused)Ursula (unused)Viring (unused)Weng (unused)Yoyoy (unused)Zigzag (unused)Abe (unused)Berto (unused)Charo (unused)Dado (unused)Estoy (unused)Felion (unused)Gening (unused)Herman (unused)Irma (unused)Jaime (unused)
Because the process of producing the flame is a chemical reaction. The reaction can only exist if there are unused chemicals to fuel the change. Once all the chemicals are used up - the reaction stops.
Unused chemicals might be contaminated, and if you poured it back into the original container, you can ruin the entire contents.
Of course, for example, Potassium Manganate(VII), KMnO4 are usually kept in a black container, because it will oxidize easily when it expose to sunlight. Different chemical store in different kind of container depend on the chemical properties of the chemical. With many chemicals it is illegal to store the chemical unless it is in its original container and has the paperwork with the container.
Enamel paint that has dried on a surface is no more or less flammable than other top coats. Many of the chemicals in enamel paint are combustible under the right conditions. It is advisable to store unused enamel paint, and many other household chemicals, in a safe environment.
A membership that is unused
Unless you really want to get into film, or have a bunch of unused film development chemicals or something, just go with a DSLR. The Nikon D90 or D7000 are good cameras to start with.
we sell unused cars! But not women!
Unused hormones are processed by the liver and excreted.