The solubility of solids in a solvent is very dependent on temperature. A solid tends to be more soluble in hot solvents than in cold. This is the reason the crystals precipitate out when the solution is cooled. There are no ideal solvents, however there are a few traits to look for when choosing the best solvent. Those that will dissolve the solute when the solution is hot but not cold.
The thick glass is more likely to crack since glass is a poor conductor of heat. In a thin glass, the heat passes more quickly from the glass into the surrounding air, causing the glass to expand equally. When hot water is poured into a thick glass, the inner surface expands, but the outer surface does not. It is this extreme stress on the glass that causes it to crack 20. What relation would your father's sister's sister-in-law be to you?
At this point, the sponge contains residual magnesium and magnesium chloride. Thus, the sponge is crushed and treated with hydrochloric acid and water in order to eliminate excess magnesium and magnesium chloride. Another method for removing the residues is the high temperature vacuum distillation. Although the hunter process is similar to the Kroll process, the hunter process is more expensive and it is only used for the production of small amounts of high purity powder. The hunter process follows the same steps as the Kroll process except for the fact that sodium is added to the vessel and therefore, NaCl is the salt that is entrapped in the pores of the sponge formed.
Similarly when the Calcium Carbonate (CaCO3) is broken down into powder the rate of reaction will increase. Because smaller pieces of the same mass of solid have a greater surface area compared to larger pieces of the solid. With this in mind when the Calcium Carbonate (CaCO3) is in solid form, the reaction rate will decrease. Procedure 1. Wear safety goggles 2.
Si, P, S and Cl are increasingly electronegative. They cannot form oxide ions from oxygen at all, so they behave as acids. The trend is from strongly basic oxides on the left-hand side to strongly acidic ones on the right, via an amphoteric oxide (aluminium oxide) in the middle. In addition, when going across the period 3 the acid-base nature of the oxides change from base to amphoteric and finally to become acid. This is because the less electronegative sodium has a weak Na-O bond and the oxygen is more easily given up to reacts with H+.
The heat from the steam decreases the viscosity of the heavy crude oil or bitumen which enables it to move down into the lower well chamber. The steam and gases rise because of their low density compared to the heavy crude oil below. The gases released, such as carbon dioxide, methane, and hydrogen sulfide, tend to rise into the steam chamber, filling the void space left by the oil. Oil and water flow countercurrent, gravity driven drainage into the lower well. The condensed water and crude oil is recovered at the surface by pumps such as progressive cavity pumps that work well with high viscosity fluids and suspended
The iodine diffused through the tube of starch solution and reached an equilibrium, because the concentration of iodine was high in the beaker compared to the tube inside. The starch was too large to diffuse through the tube. Since, the molecules of iodine are really small, it can pass through the semi permeable membrane(tube) but the starch molecules are really large so they can’t pass through the semi permeable membrane. So the reaction only happens inside the tube because that’s where starch and iodine meet. When starch and iodine bond then the solution turns purple.
One of the major sources of error in this experiment is that the volume of metal ball will rise while the surrounding water’s temperature rise. The metal ball has fixed amount of gas, so with higher volume the inner pressure of the metal ball will be lower. In order to reduce the error and improve this experiment, we can use a metal with lower coefficient of volume expansion. Objective: The objective of the second lab is to determine the relationship between the pressure and volume of gas with fixed temperature. Based on the Bayle’s Law, the pressure of the gas is inversely proportional to the volume with fixed temperature.
This was quite difficult because the readings went down very quickly. Another limitation was keeping the anode and cathode separate, so that it wouldn’t change the reading. This was difficult because they are close together. The higher the concentration of the solution, the higher the current. This means that a high concentration solution has more ions.
Ethanol boils at 78.4 ˚C, water at 100 ˚C and the azeotrope at 78.1˚C. This system is typical for separating two component feed into relatively pure overhead product containing the lower boiling component and bottoms product containing primarily the higher boiling component of the feed. The lower boiling component is the ethanol/water azeotrope and the higher boiling component is water in the ethanol/water system. The part of the packed tower below the feed point is the stripper. The stripper is the hottest section of the tower and the ethanol rich stream is vaporized and goes up the column.