examples of suspensions chemistry
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A substance that is uniform in composition is a definition of homogeneous (IPA: /hÉ™mÉ”Ë�dÊ’ÉªnÊŒs, hoË�modÊ’iË�niÊŒs/) in Chemistry. This is in contrast to a substance that is heterogeneous. The definition of homogeneous strongly depends on the context used. In Chemistry, a homogeneous suspension of material means that when dividing the volume in half, the same amount of material is suspended in both halves of the substance. However, it might be possible to see the particles under a microscope. In Chemistry, another homogeneous substance is air. It is equally suspended, and the particles and gases and liquids cannot be analyzed separately or pulled apart.
Homogeneity of mixtures
In Chemistry, some mixtures are homogeneous. In other words, mixtures have the same proportions throughout a given sample or multiple samples of different proportion to create a consistent mixture. However, two homogeneous mixtures of the same pair of substances may differ widely from each other and can be homogenized to make a constant. Mixtures can be characterized by being separable by mechanical means e.g. heat, filtration, gravitational sorting, etc.
A solution is a special type of homogeneous mixture. Solutions are homogeneous because, the ratio of solute to solvent remains the same throughout the solution even if homogenized with multiple sources, and stable because, the solute will not settle out, no matter how long the solution sits, and it cannot be removed by a filter or a centrifuge. This type of mixture is very stable, i.e., its particles do not settle, or separate. As homogeneous mixture, a solution has one phase (liquid) although the solute and solvent can vary: for example, salt water. In chemistry, a mixture is a substance containing two or more elements or compounds that are not chemically bound to each other but retain their own chemical and physical identities; - a substance which has two or more constituent chemical substances. Mixtures, in the broader sense, are two or more substances physically in the same place, but these are not chemically combined, and therefore ratios are not necessarily considered.
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Answers:A solution is a homogeneous mixture composed of two or more substances. In such a mixture, a solute is dissolved in another substance, known as a solvent. A common example is a solid, such as salt or sugar, dissolved in water, a liquid. Gases may dissolve in liquids, for example, carbon dioxide or oxygen in water. Liquids may dissolve in other liquids. A suspension is a heterogenous fluid containing solid particles that are sufficiently large for sedimentation. An example of a suspension would be sand in water. Unlike colloids, suspensions will eventually settle. A colloid is a type of mechanical mixture where one substance is dispersed evenly throughout another. http://en.wikipedia.org/wiki/Colloids#Classification_of_colloids
Answers:Solid, liquid, and gas are three phases of matter, determined by temperature and pressure. When a substance is solid it is locked into a specific form. This is the coldest form; heat is just a measurement of how much the atoms 'wiggle', and they are wiggling so little that they stay in a set pattern. As the atoms wiggle a little bit more they get enough energy to break free, but they are still somewhat attracted to one another, so they roll all over each other, and you get a liquid. As they get even more energy and move faster and faster they overcome that force of attraction and are moving so fast that they can't 'grab on' as they pass one another, and you get a gas. Pressure plays into it too. For example, water expands when it freezes, so if it is under a lot of pressure it won't freeze even if it's cold enough, because the pressure keeps it squished into liquid form. This is why there are some lakes miles under the ice in Antarctica; the water is below freezing, but the weight of the ice sheet stops it from freezing and expanding. Homogeneous and heterogeneous refer to mixtures. A mixture is a bunch of stuff which exists all mixed together but which doesn't combine chemically. A Homogeneous mixture is uniform; that is, the same all throughout. You won't see layers in this, everything is evenly spread out. Heterogeneous mixtures have more than one phase. There are further subdivisions. A colloid looks homogeneous, but, microscopically, it is heterogeneous. Milk is an example of a colloid. The particles which are dispersed in a colloid are very small (between one nanometer and one micrometer). In milk, these dispersed particles are little globs of fat which have been emulsified. Heterogeneous mixtures with particles larger than 1 micrometer are called suspensions. These particles are big enough to fall out all on their own; this is called sedimentation. An example would be flour mixed with water; the flour will all gather at the bottom if you let it sit long enough. Homogeneous mixtures with a solvent and a solute is called a solution. The solutes are particles smaller than one nanometer, and the solvent is the continuous medium (usually a liquid) which surrounds them, dissolving them. Salt water is an example of a solution. There are many different types of these (A colloid of a liquid dispersed in air is an aerosol, a suspension of a gas dispersed in a solid is a foam, etc.), but that's the basic gist of it.
Answers:Hi Dogmaster, I do believe you are on the right direction but I feel, as though, you argument is weak. Below are a few ideas for you to consider: 1) Anyone can cut out an obituary from the paper to claim it was a relative. If you want to strengthen the argument include something from the funeral like the program or information about your grandfather that was handed out at the funeral home. 2) Reason for staying in school is quite broad and generic. Make it personable and speak about what specific impact it might have on you if you are not able to continue with school. 3) It is logically constructed but very "choppy." Meaning your flow is logical but it is not clear why you have made the change. An example you mention your reason for staying in school and the impact it will have on you if you cannot continue. Then you begin, out of nowhere, start talking about reorganizing your priorities and then you move into getting help from SLAC. They are logically connected but for the reader there is no signal to state you are going to be changing your emphasis. Using transitions or markers along the way to let the reader know you are changing focus is important. 4) Trying to make this more cohesive. At least from reading your posting it reads as though your grandfather died and it impacted your schooling which then impacted your grades. You do not draw that out by talking about the impact it had on you. Instead you avoid the subject by acknowledging that you need to improve. To me, if I was making the decision I would want to know how it influence you, what impact it had on you, how you worked at resolving it, and where you are now. 5) Make it readable by either double spacing or single space within a paragraph the double spacing between each paragraph. 6) You plan is good but it is not clear to me. As a part of your plan I would have included is a target GPA, that is realistic for you to achieve. Along with that I would also include a plan on how you plan to achieve it. This means going beyond support from SLAC and taking quizzes, it means thinking about how many hours a week you plan on studying, and how you will address not understanding any material. Maybe even include milestones, a way to measure your progress against, so that everyone can know that you are on track to achieve what you have planned. 7) Finally be realistic and do not over promise on something that you cannot deliver.
Answers:colloid- a type of mechanical mixture in which extreamly small particles are evenly and stably distributes in on or more others (e.g., whipped cream is a colloid of cream particles in the air) - so basically it is a soluble solid +liquid suspension-a mechanical mixture consisting if liquid or gas with small particles that are distributed through it, but that separate out if the suspension is left undisturbed -so basically a solid+liquid solution-a homogeneous mixture of 2 or more pure substances (e.g., vinegar, because only 1 form is visible, it is uniformed throughout)