Chemical Analysis of Preparing a Solution of Sodium Chloride One of the most common practices in the laboratory is accurately to prepare chemical solutions in the laboratory. I was given the task to prepare a one mole solution of sodium chloride for a precipitate experiment. The solution must be at a high level of accuracy to make sure the experiment works next week. Safety Points Sodium Chloride · Wear safety goggles · Do not eat · Use smallest amounts possible on a watch glass to prevent contamination of the bottle · Test for sodium last as the nichrome wire is difficult to clean afterwards · Wear suitable protective clothing If splashed in eyes: In case of contact with eyes, rinse immediately with cold water and seek medical advice If spilt on floor: Scoop up and clean surface If spilt on skin or clothing: Wash off Hazard sign reads: Irritating Method and Materials 1. Using a set of scales I weighed out 14.625 grams of sodium chloride on a piece of filter paper 2. I then transferred the sodium chloride in to a 250ml beaker. 3. I then rinse the filter paper with distilled water to make sure that all the sodium chloride was in the beaker by collecting the washings. 4. I then added some distilled water and stirred with a glass rod until the solution was not saturated 5. I then transferred the solution into a 250cm³ volumetric flask. 6. I then rinsed out the beaker and glass rod into the flask to make sure there was no sodium chloride left in the beaker or on the glass rod. 7. I then used the distilled water to top up the volumetric flask until the bottom of the curve of the solution was level with the line. I then took some bodies opinion on whether or not the water was at the right level. I found the weight of 14.
5. Two or more samples may be applied to each plate if they are kept
5. A second test tube was then filled with water and placed in a test
5. I had to stay after school for an hour in order for Mrs. Logue to elucidate on genetics.
3. The beaker was filled with water and the metal was placed in the water.
how much base was needed in (ml). Once we titrated all the bottles we then
Producing Chloride Using Nitrate and Sodium Chloride Purpose of activity The purpose of the activity was to produce the insoluble salt silver chloride using the soluble salts silver nitrate and sodium chloride which I prepared in unit 1 activity 2a AB + CD = AD + CB = == == ==
to be done. This was to find out what amount of each liquid would be
6.All experimental bottles will be kept in the fridge, to keep temperature constant and not allow the milk to perish, and go all yuck
The experimental data suggest that calcium chloride (CaCl2) is the best salt to include in a hot pack because it was the most exothermic out of the tested salts. The average heat of reaction (q_(rxn,p)) of CaCl2 was calculated to be -460J. Additionally, the low cost of CaCl2 makes it an ideal choice for the widespread use of hot packs. Although the value for MgSO4 (average qrxn -443), the cost is over six times higher. Another issue to consider is the safety and toxicity of the product. According to the PubChem Open Chemistry Database calcium chloride can cause cough, sore throat and a burning sensation when inhaled (1). It can also cause redness, dry skin, and skin burns when it comes into contact with the skin. If ingested, CaCl2 can cause
NOTE: The stirring rod was not used in the First and Second experiments, as it was not available. A substitute we used the thermometer.
Sodium was first discovered and isolated by Sir Humphry Davy in 1807. Sodium is located in column 1 of the periodic table where all other alkali earth metals, which all of them have only 1 electron which it would happily give to another element that wants it so that it could be “happy” this then creates a positively charge atom also known as a cation. You could also find sodium by knowing its electron configuration which is [Ne] 3s1. Sodium physical properties are that it is silver in color and is a soft metal, so soft that in its pure form it could be cut with a knife. Sodium is a solid at room temperature, but it reaches its boiling point at around 208̊ Fahrenheit. To get sodium to boil you would have to get it to a temperature of around
4. Put each group of potato discs in one of the 6 test tubes and watch
1. The labels have fallen off of three bottles thought to contain hydrochloric acid, or sodium chloride solution, or sodium hydroxide solution. Describe a simple experiment which would allow you to determine which bottle contains which solution.
35, 40, 45, 50, 55, 60, 65, 70, 75 and 80 beads. The experiment was
For simple distillation, I added 4 mL of a 10-20% ethanol-water mixture to a 5 mL round-bottomed long-necked flask. I joined the flask to a distilling head fitted with a thermometer through...