What is the difference between a suspension and a colloid. What's an example of each?
448017
a suspension is a liquid and a solid in which the solid is in suspension in the liquid.  a good example is something like dirt and water.  the dirt is a solid and it is suspended in the water.  a colloid is a misture of two liquids.  an example is water and alcohol.  the alcohol is slightly soluble in water and so they make a colloid.
862816
Simply put, a pure substance is made up of only one type of particles.  A mixture is made up of two or more types of particles.  A homogenous mixture will look the same throughout (you won't be able to see the different particles in the mixture (e.g. antifreeze).  You will be able to see the different particles in a heterogeneous mixture (e.g. salt and pepper).
360139
A solution with the same ionic concentration as a cell.  For example, PBS is a isotonic solution with respect to human cells.  Hypertonic is higher ionic concentration, hypotonic is lower ionic concentration.  hyptonic solns will lyse cells because of osmosis, water flows into the cells while solutes flow out of the cell, to reach equilibrium.  Thus cells will lyse in water without signficant amts of solvents.
730531
Powders are solids, but at certain conditions they can behave as liquids or have liquid properties.\n\nFor example if you have a box with powder and a hole on the bottom and you inject air from the bottom, the powder will become fluid and behave like a liquid.\n\nQuicksand is a "powder" but if you have the right amount of water inside it will be a liquid you do not want to fell into....
322887
2 tablespoons is 1 fluid ounce.\n\nYou really should be more specific, though, because ounce is a unit of mass, while fluid ounce is a unit of volume.
799604
If the ionic compound is soluble, no precipitate is formed.\n\nOn the other-hand, if an ionic compound is not very soluble in the solvent, then it will precipitate out of solution.\n\nFor example, Sodium chloride is soluble and Silver nitrate is soluble, but if these solutions are mixed, some of the Silver ions will react with chloride ions and form solid Silver chloride precipitate.
361037
It is a mixture. A solution has ions in it and is possible only in liquid phase. A compound is a solid material that is formed when the materials react with each other. Even after they react they form mixed compounds. It is not suspension.
58750
A colloid is where two immiscible phases (like oil and water) is mixed to the point wher one phase forms many small, isolated droplets.  Go violently shake a bottle of Italian dressing and you'll see one example, or grab a stick of butter to see another.
127488
Their difference in polarity and density are probably the two most likely properties to affect the rate of separation. Molecular weight differences between the two liquids would probably have some impact, also temperature would effect the rate of separation.
801001
Ok, this is a weird question, but here's my best answer.  The 2 liquids stay separate because of density.  The green liquid is cooler and contains salt, both of which increase its density.  The red liquid is warmer (its molecules are moving faster and are farther apart) so it's less dense and should float on the denser green solution (unless you shake them, which is why the card method is used).
38108
It's a colloid in the form of gas in a solid.
344434
To correctly simulate the rheology of concentrated suspensions at high shear rates requires the inclusion of hydrodynamic forces between particles. The computation of such interactions is very intensive, and it presents a significant challenge: to produce algorithms that enable a study of systems with large numbers of particles. The work of Brady and coworkers in the early eighties [1] showed the way forward to such a goal. The technique, Stokesian Dynamics presents a formalism for studying such systems. We first write down the Langevin equation for a colloidal particle within a hydrodynamic medium:\n\nFH + FC + FB = M · dU/dt\n\nHere, F represents forces acting on an individual particle: Hydrodynamic, Colloidal (charge repulsion/attraction for example) and Brownian forces. M is the mass of the particle, and U its velocity.Within a colloidal system, the time scales of interest dictate that inertia may be neglected. Thus the right hand side of above equation can be neglected. We also work with the assumption that the fluid obeys the Stokes equations, i.e. we are within a low Reynolds number regime. Thus the hydrodynamic forces can be considered linear in the velocities, therefore FH = R·U, where R is a resistance tensor, the elements of which describe the hydrodynamic interactions between individual particles. To simulate colloid particles, we need to determine the particles velocities at each time step, thus the above equation becomes:\n\nU = -R-1 · (FC + FB)\n\nThus solving for U requires the inversion of the resistance matrix R. This typically restricts the size of the systems that one can study to less than 100 particles. In order to simulate systems on a larger scale, Ball and Melrose [2] have proposed an approximation that is applicable to colloids at high concentrations in shear flow. They argue that at such concentrations, where the typical interparticle spacing is small, the near-field terms in the resistance matrix (which are given by lubrication theory) will dominate in shear flow. Thus R can be made sparse; this greatly increases computational efficiency. The method is now typically of O(N2) compared to O(N3) for the full matrix, making the study of larger systems feasible (typically as much as 4,000 particles). Even though the resistance tensor is sparse and consists of near-field terms, the inversion of such a matrix results in a many-bodied far-field mobility tensor. Ref. [2] gives full details on the technique, in particular how to correctly handle the correlated Brownian forces through use of a 2nd order difference scheme. The code has been implemented and validated. It has a suite of colloid interactions, including charge, depletion, and polymer coats. Particles may interact with just squeeze lubrication or with full modes of shear and rotation. Nearest neighbours are identified through the construction of a Delaunay mesh which is co-moving with the particle centres. Sample results from using this algorthim are given in the Colloid Rheology section of this site.\n\nReferences\n\nBrady, J. F. and G. Bossis, "The rheology of concentrated suspensions of spheres in simple shear flow by numerical simulation," J. Fluid Mech, 155, 105-129 (1985) \nBall, R. C. and J. R. Melrose, "A simulation technique for many spheres in quasi-static motion under frame-invariant pair drag and Brownian forces," Physica A, 247, 444-472 (1997)
578419
whey is a protein which when seperated from the curdor casein which form a solid , remains a liquid in suspension\nof itself there is no surface tension as that is born by the casein - whey has a freezng point lower that water because of it's fat content and it's viscosity by that very nature,\nthough variable is more dense that most liquids
504503
Hopefully this can help clear things up.\n Yes, the answer is raisin bran.\n\nA. Milk: homogeneous colloid when < 5% because everything in it is evenly didtributed(Otherwise it is a suspension when the milk fat concentration is greater than 5 because the milk fat will rise to the top).\n\nB. Sugar Water: homogeneous because it is evenly distributed and can only be separated by evaporation or a supersaturated solution + sugar crystal.\n\nC. Raisin Bran: HETEROGENEOUS because you can see the different materials it is made up of with no difficulty.\n\nD. Air: Homogeneous because, although it is made up of so many things, one cannot see the differences in particles.
444550
The difference in solubility of the components allows for separation.  I don't remember the specifics, but that is the reason.  Water will not have a big enough difference.
340597
there's not too much difference, other than  the density which causes the drag coefficient. however, water has surface tension, which may be slightly important in causing greater drag
1181467
i would say it's a colloid\n\ncolloid="In general, a colloid or colloidal dispersion is a substance with components of one or two phases, a type of mixture intermediate between homogeneous solution and heterogeneous mixture with properties also intermediate between a solution and a mixture."----basically meaning solids suspended in a liquid