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Why water samples are pure?
Only refined water (by distillation, ion exchangers, reverse osmosis etc.) may be pure.
All samples of pure water have the same mass?
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.
Should the density of Al be the same for all Al samples?
The density of pure aluminium is the same for all samples.
Which samples of water can be termed as pure water?
Pure water is typically defined as water that contains no impurities or contaminants, primarily consisting of H₂O molecules. Distilled water, deionized water, and water that has undergone reverse osmosis are examples of pure water, as they have been processed to remove minerals, salts, and other substances. However, achieving absolute purity is challenging, as even distilled water can still contain trace amounts of contaminants. In practice, pure water is often regarded as water with a very low concentration of dissolved solids and pollutants.
Why do you not find pure samples of highly reactive elements on ground?
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.
Why water samples are pure?
Only refined water (by distillation, ion exchangers, reverse osmosis etc.) may be pure.
Is water a mixure or a pure substance?
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.
All samples of pure water have the same mass?
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.
What is the function of methylene blue solution on polluted water samples?
Polluted water sample will decolorize the methylene blue solution faster than a pure water sample.
Where is the best place to buy pure element samples?
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.
Which type of bonding are likely be involved in the samples that were not conductors in their pure form but conducted a current when they were mixed with water?
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.
Why is water made with salt water colder than water made with pure water?
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.
Should the density of Al be the same for all Al samples?
The density of pure aluminium is the same for all samples.
Are there pure samples of alkali metals in the earth's crust?
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Are all samples of water have the same composition of hydrogen and oxygen?
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.
Which samples of water can be termed as pure water?
Pure water is typically defined as water that contains no impurities or contaminants, primarily consisting of H₂O molecules. Distilled water, deionized water, and water that has undergone reverse osmosis are examples of pure water, as they have been processed to remove minerals, salts, and other substances. However, achieving absolute purity is challenging, as even distilled water can still contain trace amounts of contaminants. In practice, pure water is often regarded as water with a very low concentration of dissolved solids and pollutants.
How do you make pure samples of plutonium?
Pure plutonium is obtained as a result of the reaction of PuF4 with calcium, barium or lithium.
