Thiosulphate solution

Supersaturated Solutions Lab Purpose: The purpose of this lab was to see the differences between unsaturated, saturated, and supersaturated solutions. Brief Background: The concepts used in this lab are solutions and solubility. Within a solution there is a solvent and a solute. In this lab, the solvent was the distilled water and the solute was the sodium thiosulphate pentahydrate. Within each test tube we dissolved sodium thiosulphate pentahydrate with water to create a solution which was either

lecture, you will be able to Define viscosity and viscosity coefficient Outline the method to measure viscosity using Ostwald viscometer Determine the average molecular weight of a polymer Determine the surface concentration of 1-butanol in aqueous solution Measure the distribution coefficient of a solute betweenn two solvents 39.1 Introduction Viscosity, one of the transport properties, arises because of intermolecular attractive and relatively long-range forces. Viscosity coefficient ([pic])

Red solution; brown precipitate when heated. | SO32- ; CH3COO- may present | | Purplish solution decolourise. | S2O32- may present | (iv) Add aqueous silver nitrate, followed by HNO3 | White precipitate, soluble in HNO3 / NH3 (aq), or SO32− in excess; turn black precipitate when heated. | SO32- may present | | White precipitate turn to yellow and then brown and finally black; white precipitate soluble in excess S2O32−. | S2O32- may present | | White precipitate in concentrated solution, soluble

"Do different concentrations of solutions determine the mass of a potato?" Introduction: The way to get the full results of this lab was through the process of osmosis. Osmosis is the movement of water across a membrane into a more concentrated solution to reach an equilibrium. When regarding cells osmosis has three different terms that are used to describe their concentration. The first of these words is isotonic. Cells in an isotonic solution show that the water has no net movement and the amount

Materials & Methods In the osmotic lab seven cups , a marker, metric ruler, digital balance, paper towels, a knife and seven cups containing solutions 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6m of sucrose were used in the experiment. The marker was used to label the seven cups with the seven different concentrations of sucrose . A cork borer was used to cork the potato and then the metric ruler was used

Effects of temperature manipulation and solution treatment on the Beta vulgaris craca plant cell membrane and the change of the concentration of betacyanin when placed under these various stresses Introduction: The Beta vulgaris craca plant, commonly referred to as the beet root contains a pigment, red in colour, called betacyanin. The betacyanin’s containment within the cells of the beet root cell relies on the stability of the plant’s membrane structure. The manipulation of the cell’s membranes

Concentrations of Salt Solutions Introduction: Osmosis is the movement of water molecules across a partially permeable membrane from a region of high water potential to a region of low water potential. It can be affected by several different variables including concentration of salt solutions. When a plant cell is put in pure water it will become turgid and it will not burst due to the presence of a cell wall and a large permanent vacuole and when it is put in a concentrated solution it will be plasmolysed

is used to purify solids. This process dissolves a crude solid with impurities in a mildly boiling solvent, and cooling down the mixture afterwards for crystals to reconstruct themselves in solution. This method allows impurities to separate and remain in solution as precipitate or remain uniform in solution. Solids are more soluble in hot solvents than in cold ones, allowing maximum dissolution for proper separation and subsequent crystallization to occur. After purifying the compound, the melting

is considered hypertonic. When a red blood cell is dropped into a beaker of distilled water solution the red blood cell will burst. The reason the red blood cell exploded was because the cytosol has more solute than the distilled water and the distilled water move into red blood cell. This environment is called hypotonic. If a red blood cell is dropped into a beaker of the same solute concentration solution as the cytosol, the water will move in and out of the cell. This creates no net movement of

potato strips and three unknown solutions (A, B, C). First three slides were prepared containing RBC’s and unknown solutions A, B and C. A control slide was prepared only using RBC’s. After observing each slide under the microscope it was determined that unknown solution A was hypertonic because the RBC appeared to have shrunk. The RBC in unknown solution B appeared to be swollen, therefor, the tonicity of unknown solution B was hypotonic. Unknown solution C showed no change to the RBC shape