Extraction Of Salt From A Mixture. Priscilla Etim. Thursday

I would use a p200 pipette by set it to 200μl with a tip on it and then pulling up the solution slowly and put it into a beaker. I would used a p100 pipette and set it to 50μl and put the solution in the same beaker. or I would use a p1000 pipette and set it to 250μl.

2. Used a test tube clamp to held the test tube and gently heated the tube in a laboratory burner flame for about 30 seconds.

1) Separate the solid from the liquid in the beaker by decanting the liquid. Ask your instructor to demonstrate the correct procedure.

Before beginning an experiment, it is good to calibrate any equipment that needs calibration. This ensures that results obtain will be as accurate as possible or as near to the true value. All equipment should be inspected to ensure that there are no chips, cracks or general damage to the equipment as these could cause problems during the experiment which could affect the overall results gained. Equipment such as burettes, pipettes, flasks and beakers must be rinsed with distilled water to get rid of any impurities in the equipment. If solutions are to be poured in any piece of equipment then the equipment should also be rinsed out with the solution being used, this will maintain the pH level in the instrument. Once a solution is transferred from the pipette to the flask, touching the tip of the pipette on the side of the flask will drain any extra drops that may still remain on the tip of the pipette.

The composition of a pure substance is constant, and thus pure substances have characteristic physical properties that do not change and this is why we are able to separate each element in this lab experiment. Examples of physical properties that can be used to describe pure substances include solubility, conductivity, magnetism, density, boiling point, and melting point.

1 ml of water should be added to the first test tube and make a note. In the second test tube, 1 ml of methyl alcohol should be added. In the third test tube, 1 ml of hexane must be added. Lastly, the fourth test tube will be a control.

In this lab, lab 4.3 Comparing the Concentrations of Saturated Solutions, we set out to find and compare the solubilities of two solids in water. In addition, we tested if solubility is a characteristic property of a solid in a given liquid. This lab allowed us to test and use a reliable way to measure the solubility of a solid. This lab can be replicated for any solid with the same procedure, thus it gives us a method to calculate solubility. The two solids we tested in this experiment were NaCl (Sodium Chloride) and NaNO3 (Sodium Nitrate).

Simple distillation is a separation technique which can be used to separate and purify distillates from a liquid mixture which ideally contains one volatile and one non-volatile compound. If such ideal conditions are not possible—as is usually the case—then simple distillation can be applied as long as the liquid in question is composed of compounds that differ in volatility such that their boiling points differ by at least 40 to 50 degrees Celsius. Because

A physical property is any property that is measurable whose value describes a state of a physical system and it can be observed and tested. They include properties such as color, length, volume, odor, and density. These properties are extensive if they depend on the amount of the substance being used or intensively if they do not depend on the amount of the substance being used. In this lab, the color, texture, and mass of iron, zinc, and sodium chloride were

The purpose of this experiment is to identify unknown substances by finding certain properties that this substance has. Like the density,melting point and the boiling point with these we are able to identify the unknown liquid and unknown solid that we are given. In order to get the density of a liquid we are first going to divide the mass of the liquid by the volume of the liquid in order to get us the density. In order to get the density of a solid we are going to divide the mass of the solid by the volume of the solid in order to get us the density of the solid. Next we are going to want to find the boiling point of a liquid we find this by placing a thermometer and test tube into a beaker with some water in it. Then we boil it and record the data we are going to want to record the start of the boiling and constant temp of the boiling then use this equation ( Start of boiling + constant temp of boiling ) / 2. This will give us our boiling temperature +/- 5 degrees. Finally we are going to want to find the melting point of a solid we do this by placing the tube in the device that determines the melting point of a solid. Then we

2. Determine the room’s air temperature, and also measure the diameter of the glass tube. Record the data.

melting point of an unknown substance to that of a true compound. This method can be

Laboratory ABC uses both glass pipettes (1mL to 5mL) and disposable plastic pipette tips- yellow (20μL), blue (1000μL) and white (5mL). Glass pipettes and white pipette tips are currently washed and reused. Blue and yellow tips are discarded.

Purpose of this experiment was to find the amount and percent of water in a hydrated salt. Also, to successfully determine percent error and standard deviation. Hydrated salts are substances that occur naturally who usually contain an amount of water molecules chemically bonded to the compound. A few hydrated salts have weak bonds within the water molecules which allows heat to remove the water molecules creating an anhydrous salt. Hydrated salts that lose water molecules to the atmosphere without a heat source are known as efflorescent. Salts that readily absorb water are called deliquescent. An example of an anhydrous salt would be Magnesium Sulfate or also known as Epsom Salt. Epsom salt separates under heating and becomes

Physical changes can be seen through an altering of the substances physical property. A substances physical property is observed and measured without changing the composition of the subject. Descriptive words that would help to identify a substance’s physical property include hard, soft, brittle, flexible, heavy, and light just to name a few.