Samples that are pure water include distilled water, rainwater, and water that has been filtered through a reverse osmosis system. These samples do not contain any dissolved minerals or impurities.
Only refined water (by distillation, ion exchangers, reverse osmosis etc.) may be pure.
Yes, all samples of pure water have the same mass because the mass of water is determined by its chemical composition, which consists of two hydrogen atoms and one oxygen atom. This means that regardless of the volume or container, the mass of pure water remains constant.
The density of pure aluminium is the same for all samples.
Highly reactive elements readily react with other substances in the environment, making it difficult to find pure samples. They are typically stored in a protective atmosphere or as compounds to prevent reactions with air or moisture. Handling pure samples of highly reactive elements requires specialized equipment and expertise due to their tendency to react violently.
Samples that are pure water include distilled water, rainwater, and water that has been filtered through a reverse osmosis system. These samples do not contain any dissolved minerals or impurities.
Only refined water (by distillation, ion exchangers, reverse osmosis etc.) may be pure.
Strictly, water itself is a pure substance, but most of the samples of water we meet are mixtures. De-ionized water which we use in the lab is water and nothing else (pure). Tap water and natural samples from the world around us contain dissolved substances from the air and the rocks, so they are mixtures.
Yes, all samples of pure water have the same mass because the mass of water is determined by its chemical composition, which consists of two hydrogen atoms and one oxygen atom. This means that regardless of the volume or container, the mass of pure water remains constant.
Polluted water sample will decolorize the methylene blue solution faster than a pure water sample.
You can buy pure element samples from reputable online suppliers such as Luciteria or GalliumSource. These suppliers offer a wide range of pure element samples for educational and collection purposes. Be sure to verify the credibility of the supplier before making a purchase.
These samples likely involve ionic bonding. In their pure form, they are not conductive because the ions are not free to move. When mixed with water, the compounds dissociate into ions, which can move freely in the solution and conduct electricity.
Salt makes the water colder. Neither the question nor the answer make any sense. The question needs more context than it has. It sounds like you meant to ask something about the freezing point of water but you said 'water' not 'ice'. You don't tell us whether you started with two identical samples and added salt to one or whether two friends brought you samples of pure and salt water and you simply measured the temperature of both. One could easily make a counter-example by heating salt water and not heating pure water. The salt water will be warmer than the pure water.
The density of pure aluminium is the same for all samples.
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Yes, all samples of water have the same composition of hydrogen and oxygen, with each water molecule containing two hydrogen atoms and one oxygen atom. This is consistent regardless of the source or location of the water.
Pure plutonium is obtained as a result of the reaction of PuF4 with calcium, barium or lithium.