The simple addition of water to FeSO4 will not lead to the formation of FeSO4•7H2O. Determination of the number of molecules of water in a hydrate. If you do not know how many molecules of water are in one molecule of hydrate and want to find this out, it can be done by measuring the masses of the hydrate and anhydrous compound formed after the heating. For example, let’s assume that we do not know how many water molecules are attached to BaCl2. Let’s call this number X.
Final Essay Exam GEOL 108 1. Describe the paths of water through the hydrologic cycle. Explain the processes and the energy gains and losses involved in the changes of water between its 3 states. Operationally, we often most concerned with water does when it reaches the solid earth, both on the surface and in the sub-surface. Explain the relationship between the saturated zone, the water table, a ground water well and the cone of depression, all within the sub-surface.
The dialysis tubing was one I especially monitored, checking every hour with recordings. After this observation, the raw egg was observed while placed within the jar, followed by the kayo syrup with the dialysis bag. With this I noted that osmosis caused the syrup in the dialysis bag to somehow seep out into the water, then allowing water too within the bag until a point of equilibrium was reached. Concerning the raw egg and vinegar, I noted that bubbles were formed leading me to believe that another compound or element from the binegar was the cause, along with the possible explanation of the egg shells disappearance. The egg also expanded in size with the vinegar, leaving me
Laura Mccain Lab 5: Osmosis with Hypertonic, Isotonic and Hypotonic tonicity Purpose: The purpose of this lab is to familiarize you with osmosis and, specifically, what happens to cells when they are exposed to solutions of differing tonicities. Hypothesis: Hypotonic Solution: the cell has a higher concentration in it than in the area surrounding it. Water moves into the cell to equal out concentration. Isotonic Solution: The cell has a equal proportion of concentration with the area surrounding. Water continually flows in and out to keep concentration even.
Normally, net diffusion of both solute and water occurs until the concentration of water (and solute) is the same on both sides of the membrane (equilibrium). When the membrane is impermeable to solutes it creates a different result. In this situation, water diffuses from the side with lower solute concentration to the side with higher solute concentration. This continues until its concentration is the same on the two sides of the membrane. The movement of water leads to dramatic changes in the volumes of the two compartments.
D) the absence of charged molecules inside cells. Answer: C Page Ref: Section 3 11) The ________ pressure is the pressure required to prevent the flow of solvent through a solvent-permeable membrane that separates two solutions of different solute concentration. A) hydrostatic B) electromotive Answer: C Page Ref: Section 3 12 C) osmotic D) partial 12) Which is true about the solubility of electrolytes in water? A) They are all insoluble in water. B) They are usually only sparingly soluble in water.
[2] A saturated solution is one that holds as much dissolved solute as possible at a given temperature, therefore only a small amount of a slightly soluble ionic compound is needed to produce a saturated solution of that compound. [2] The solubility of a salt is the amount of the salt that
In part C of the experiment, we were to demonstrate osmosis between distilled water and each of the solutions in the dialysis tubes (water, 0.2 M, 0.6 M, 0.8 M, and 1.0 M sucrose all represented by unknown colors). We hypothesized that all of the dialysis bags except water will increase in mass. This is because the bags will be hypertonic to the distilled water solution in the beaker, meaning that there are more solutes and less water than the surrounding. In a hypertonic condition, water is rushed into the cell (or the dialysis tube in this case) in order to dilute the concentrated solution in the cell. Water would not change in mass because it is isotonic to its surrounding.
3. 4. Increasing the concentration of a solution will __________ the boiling point of the solution Increasing the concentration of a solution will __________ the freezing point of the solution Procedure: (BE SURE TO RECORD ANY OBSERVATIONS!) 1. Measure 1/2 cup (c) milk and 1/2 c whipping cream; put into a small Zip-lock baggie.
In general, the osmotic pressure of a solution is the pressure that should be applied to the solution to halt the net flow from a pure solvent across the membrane into the solution. FO uses the osmotic pressure differential (∆π) across the membrane, rather than hydraulic pressure differential (as in RO), as the driving force for transport of water through the membrane [3]. The FO process lead to concentration of feed solution and dilution of a draw solution. Pressure-retarded osmosis (PRO) can be recognized as an intermediate process between FO and RO, where hydraulic pressure is applied in the opposite direction of the osmotic pressure gradient (similar to RO). However, the net water flux is still in the direction of the concentrated draw solution (similar to FO).The general equation describing water transport in FO and RO and PRO is: Jw= A(σ∆π − ∆P) Where; Jw is the water flux, A the membrane water permeability constant, σ the reflection coefficient, and ∆P is the applied pressure.