Yes and no. But in the strictest chemical sense, no.
Pure distilled water is two parts hydrogen mixed with one part oxygen. The parts in this case are atoms. Water (H2O) is considered a pure substance. It's a chemical compound, and as such it has its own chemical properties.
However, pure water is not usually what you are dealing with, e.g. from a faucet. There are other chemical compounds mixed into it, for example, calcium carbonate or other salts. In a sense, this version of water plus something else can be considered a mixture.
A mixture is therefore a glass of water with other things dissolved inside, like a flavored powder, tea, coffee, or medicine. Each of the substances in that glass keeps its own chemical properties. So, if you have dissolved substances in water, you can evaporate the water and still have those dissolved substances left over. If you have some salt (NaCl) in water and then boil off that water, the salt remains in the pan.
Yes and no. But in the strictest chemical sense, no.
Pure distilled water is two parts hydrogen mixed with one part oxygen. The parts in this case are atoms. Water (H2O) is considered a pure substance. It's a chemical compound, and as such it has its own chemical properties.
However, pure water is not usually what you are dealing with, e.g. from a faucet. There are other chemical compounds mixed into it, for example, calcium carbonate or other salts. In a sense, this version of water plus something else can be considered a mixture.
A mixture is therefore a glass of water with other things dissolved inside, like a flavored powder, tea, coffee, or medicine. Each of the substances in that glass keeps its own chemical properties. So, if you have dissolved substances in water, you can evaporate the water and still have those dissolved substances left over. If you have some salt (NaCl) in water and then boil off that water, the salt remains in the pan.
Soda water is a solution of water (H2O) and carbon dioxide (CO2). Since it has a variable composition and there are not chemical bonds involved, it is a mixture.
Note that there is some chemical reaction between CO2 and H2O, producing some carbonic acid H2CO3. This is what gives a slight acidity to soda water.
Soda water is a solution of water (H2O) and carbon dioxide (CO2). Since it has a variable composition and there are not chemical bonds involved, it is a mixture.
Note that there is some chemical reaction between CO2 and H2O, producing some carbonic acid H2CO3. This is what gives a slight acidity to soda water.
Well, this is the hydrate of the barium chloride salt …. the which we would represent as [math]BaCl_{2}•6H_{2}O[/math]. The so-called [math] ext{waters of crystallization}[/math] are along for the ride, and are incorporated into the structure of the barium chloride salt … in fact the barium ion might have SIX oxygen nearest donors… Given prolonged heating, the waters could be removed to give an anhydrous barium salt…
Well, this is the hydrate of the barium chloride salt …. the which we would represent as [math]BaCl_{2}•6H_{2}O[/math]. The so-called [math]ext{waters of crystallization}[/math] are along for the ride, and are incorporated into the structure of the barium chloride salt … in fact the barium ion might have SIX oxygen nearest donors… Given prolonged heating, the waters could be removed to give an anhydrous barium salt…
A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Mixtures are physical combinations of two or more elements and/or compounds. Hence Sugar water is a homogeneous mixture as it is composed of H2O and sugar.
A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Mixtures are physical combinations of two or more elements and/or compounds. Hence Sugar water is a homogeneous mixture as it is composed of H2O and sugar.
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Yes and no. But in the strictest chemical sense, no.
Pure distilled water is two parts hydrogen mixed with one part oxygen. The parts in this case are atoms. Water (H2O) is considered a pure substance. It's a chemical compound, and as such it has its own chemical properties.
However, pure water is not usually what you are dealing with, e.g. from a faucet. There are other chemical compounds mixed into it, for example, calcium carbonate or other salts. In a sense, this version of water plus something else can be considered a mixture.
A mixture is therefore a glass of water with other things dissolved inside, like a flavored powder, tea, coffee, or medicine. Each of the substances in that glass keeps its own chemical properties. So, if you have dissolved substances in water, you can evaporate the water and still have those dissolved substances left over. If you have some salt (NaCl) in water and then boil off that water, the salt remains in the pan.
Yes and no. But in the strictest chemical sense, no.
Pure distilled water is two parts hydrogen mixed with one part oxygen. The parts in this case are atoms. Water (H2O) is considered a pure substance. It's a chemical compound, and as such it has its own chemical properties.
However, pure water is not usually what you are dealing with, e.g. from a faucet. There are other chemical compounds mixed into it, for example, calcium carbonate or other salts. In a sense, this version of water plus something else can be considered a mixture.
A mixture is therefore a glass of water with other things dissolved inside, like a flavored powder, tea, coffee, or medicine. Each of the substances in that glass keeps its own chemical properties. So, if you have dissolved substances in water, you can evaporate the water and still have those dissolved substances left over. If you have some salt (NaCl) in water and then boil off that water, the salt remains in the pan.
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Soda water is a solution of water (H2O) and carbon dioxide (CO2). Since it has a variable composition and there are not chemical bonds involved, it is a mixture.
Note that there is some chemical reaction between CO2 and H2O, producing some carbonic acid H2CO3. This is what gives a slight acidity to soda water.
Soda water is a solution of water (H2O) and carbon dioxide (CO2). Since it has a variable composition and there are not chemical bonds involved, it is a mixture.
Note that there is some chemical reaction between CO2 and H2O, producing some carbonic acid H2CO3. This is what gives a slight acidity to soda water.
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Well, this is the hydrate of the barium chloride salt …. the which we would represent as [math]BaCl_{2}•6H_{2}O[/math]. The so-called [math] ext{waters of crystallization}[/math] are along for the ride, and are incorporated into the structure of the barium chloride salt … in fact the barium ion might have SIX oxygen nearest donors… Given prolonged heating, the waters could be removed to give an anhydrous barium salt…
Well, this is the hydrate of the barium chloride salt …. the which we would represent as [math]BaCl_{2}•6H_{2}O[/math]. The so-called [math]ext{waters of crystallization}[/math] are along for the ride, and are incorporated into the structure of the barium chloride salt … in fact the barium ion might have SIX oxygen nearest donors… Given prolonged heating, the waters could be removed to give an anhydrous barium salt…
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Ba belongs to Group 2 in the periodic table and Cl belongs to Group 17.
The valency of Ba is +2 and that of Cl is -1.
Now when Barium Chloride is formed, it should be a neutral compound, i.e. net charge should be zero.
So, to balance or nullify the +2 charge on Barium, we require 2 Cl atoms. Then net charge = +2 + 2*(-1)= 0.
And as a rule in ionic compounds we write the cation ( positive charge atom) first and then the anion (negative charge atom).
So, we get BaCl2
Ba belongs to Group 2 in the periodic table and Cl belongs to Group 17.
The valency of Ba is +2 and that of Cl is -1.
Now when Barium Chloride is formed, it should be a neutral compound, i.e. net charge should be zero.
So, to balance or nullify the +2 charge on Barium, we require 2 Cl atoms. Then net charge = +2 + 2*(-1)= 0.
And as a rule in ionic compounds we write the cation ( positive charge atom) first and then the anion (negative charge atom).
So, we get BaCl2
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20% by mass…mix 20g barium chloride with 80g of water=100g of a 20% BaCl2 solution by mass.
20% by mass…mix 20g barium chloride with 80g of water=100g of a 20% BaCl2 solution by mass.
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A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample.
Mixtures are physical combinations of two or more elements and/or compounds.
Hence Sugar water is a homogeneous mixture as it is composed of H2O and sugar.
A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample.
Mixtures are physical combinations of two or more elements and/or compounds.
Hence Sugar water is a homogeneous mixture as it is composed of H2O and sugar.
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Filter it out. Barium sulfate is very insoluble.
Filter it out. Barium sulfate is very insoluble.
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