movement of water through a semi-permeable membrane from a region of low solute concentration to an area of high solute concentration in order to equalize the level of water in each region. Involved in this process are hypotonic‚ hypertonic and isotonic solutions. A hypotonic solution is one with a lower osmotic pressure‚ indicating that the net movement of water moves into the said solution whereas a hypertonic solution is one with a higher osmotic pressure‚ thus the net movement of water will be
Premium Osmosis
NaOH (±0.05mL) First titre 21.3 Second titre 18.2 Third titre 15.2 Fourth titre 12.0 Qualitative data Observations: When dissolving the acid X in the water‚ most of it did not dissolve and become whitish foam sitting at the top of the solution. When transferring the acid from the mortar to the flask by washing it with water‚ the low solubility of the acid made it hard and some of it was still stuck in the mortar and was not transferred into the flask. When phenolphthalein was added
Premium Acid Sodium hydroxide Solubility
The Charge/Mass (e/m) Ratio of the Electron PHYS 0212: Introduction to Laboratory Physics Fall 2012 Abstract The experiment conducted demonstrated correlation between the charge and mass of an electron and the behavior of magnetic fields. The lab was divided into four parts. The first three parts were conducted with a compass that was used to locate the magnetic field lines around a bar magnet‚ a solenoid and then a pair of Helmholtz coils. As a result of these trials‚ our observations found
Premium Magnetic field
table 1.1‚ it is shown that at wavelength 590nm‚ bromophenol blue has the Amax which is 0.752. Part 2: The effect of concentration on absorbance of bromophenol blue solution Table 1.2a Tube 1 2 3 4 5 6 A B Distilled water(ml) 2.5 2.0 1.5 1.0 0.5 0 Bromophenol blue 10mg/L (ml) 0 0.5 1.0 1.5 2.0 2.5 Concentration of bromophenol blue(mg/L) 0 2.0 4.0 6.0 8.0 10.0 Absorbance at 590nm (Amax of bromophenol blue) 0 0.182 0.284 0.437
Premium Solution Curve Concentration
reactions where the active site is being involve in coordination to a metal ion. PROCEDURE: (A) Preparation of Trans-Dichlorobis(ethylenediamine)cobalt(III) chloride 1. About 16g of cobalt(II)chloride hexahydrate is dissolved in 50ml of distilled water in 250ml of Erlenmeyer flask. 2. 60ml of 10% solution of ethylenediamine is added into the flask. 3. A vigorous stream of air is being drawn through the solution for about 1-2 hours 4. 35ml of concentrated hydrochloric acid is added 5. The solution
Premium Chlorine Hydrochloric acid Solvent
and not a separate entity. In this document‚ only health and safety aspects will be considered. The terms "job" and "task" are commonly used interchangeably to mean a specific work assignment‚ such as "operating a grinder‚" "using a pressurized water extinguisher‚" or "changing a flat tire." JHAs are not suitable for jobs defined too broadly‚ for example‚ "overhauling an engine"; or too narrowly‚ for example‚ "positioning car jack." What are the benefits of doing a Job Hazard Analysis? The
Premium Occupational safety and health
extensive properties‚ and intensive properties. Where do the units for mass and volume) come from and what do they mean? What is the density of distilled water? What is Archimedes principle? Does temperature affect the density of a solid? Liquid? Gas? Materials: Safety glasses‚ 10‚ 25 or 50 mL graduated cylinders Distilled water Metal Samples W‚ X‚Y & Z Procedure: 1. Class split into 5 groups. Every group will get data for four metals and tell it to the class 2. Choose a
Premium Water Liquid Density
tubes in the 40 degrees celsius water bath and incubate them for 10 minutes. The other thing needed is glucose strips. After the tubes have been incubated for 10 minutes‚ place a glucose strip in each tube for one second. Let it sit for thirty seconds‚ then compare to the chart provided. For unit 7.4 the experiment called for two microfuge tubes. One labeled "control" and label another one "EDTA". Add 1.25 mL of EDTA to the EDTA tube‚ add 1.25mL of distilled water to the control tube. Add 3 drops
Premium Null hypothesis Enzyme Disaccharide
limiting reagent between the reaction of lead (II) nitrate and potassium iodide. To determine the percent yield of lead (II) iodide. Date Started: 13/4/12. Finished: 19/4/12. Data collection and processing Measurements: * Amount of distilled water: 75.0ml ± 0.5ml. * Mass of watch glass: 31.65g ± 0.01g. * Mass of watch glass + potassium iodide: 32.45g ± 0.01g. * Mass of potassium iodide: 0.8g ± 0.02g. * Mass of watch glass + lead (II) nitrate: 32.66g ± 0.01g. * Mass of lead
Premium Stoichiometry Yield Molecule
solutions to mix. 9. Measure and record the total mass of the flask and all its contents. Part B : Antacid Tablet in water 1. Take a Erlenmeyer flask and fill it half with water. 2. Take an antacid tablet out of its package. 3. Place the tablet and the flask containing water on the balance scale. Record the mass of the flask‚ water‚ and the tablet. 4. Add the tablet to the water and record your observation. 5. When the reaction has come to a stop‚ measure and record the total mass of the flask
Free Sodium hydroxide Chemistry Sodium