Materials Protective Glasses | Beaker (250ml) | Stirring rod | Filter funnel | Filter paper | Evaporating basin | Bunsen burner | Heat resistant mat | Tripod | Gauze | Sand | Salt | Matches | | | Method After collecting all the materials needed for the experiment, the students were asked to weigh a mixture of sand and salt (5g) into a 250ml beaker. They also weighed the combined weight of the beaker and salt and sand mixture. They then poured 50ml of distilled water into the beaker, making sure to stir well with a stirring rod to dissolve all of the salt. They then weighed a piece of filter paper, folded it into a cone shape that would fit into the filter funnel, pressing it onto the inner walls of the funnel to make sure no sand would be lost in error. (See diagram below) Water was poured through the filter funnel.
Separate the sand by boiling water and pouring the water off, then move on to separating the Benzoic acid using filter paper. Lastly separate the salt out by allowing the water to evaporate from the solution. Data Tables: Data Table 1: Experiment Data | | Grams | Percent of mixture | Iron filings | 1.5g | 24.6% | Sand | 1.6g | 26.2% | Table salt | 1.8g | 29.5% | Benzoic acid | 1.2g | 19.7% | Total | 6.1g | 100% | Questions: A. I proposed the magnet would remove the iron from the mixture. I thought the sand might be removed by filtration. I thought distillation would remove the salt.
The watch glass was removed with the beaker tongs. Using a rubber bulb and a stirring rod to stir the solution continuously, 15.00mL of .25M BaCl2 solution was added to the solution in the beaker. The watch glass is replaced and the solution is keep hot but not boiling for 15 minutes. The precipitate was allowed to settle. When the liquid above the precipitate was clear, the solution was tested for completeness of precipitation when a few drops of BaCl2 solution were added from a pipette.
Dear Bob So you want to get salt from rock well all you have to do is. First you add some water to the rock salt (a mixture of sand mud and salt) Next warm and stir the mixture of rock salt and water for about 5 minutes. After Fold a filter paper in to quarters fit the cone of filter paper inside a funnel or something like a funnel. Once that’s done pour the rock salt and water mixture through the filter paper and allow the mixture to filtrate (to drip into the funnel only the pure salt dissolves) Take care when pouring that you don’t fill above about half way of the filter paper. The salt solution passes through the filter paper but the sand and dirt are trapped in the filter paper.
Purpose The main objective of this lab is to use qualitative analysis to understand and recognize the chemical properties of certain Group 1 cations, which are Ag+, Pb2+, and Hg2+, and to use their inherent properties to identify whether they are present in an unknown sample. These three particular cations, known as the Silver Group, can be separated and isolated from each other by forming insoluble chloride salts. Introduction Chemistry is an analytical science, which is based heavily on experimentation and observation. The data that can be obtained through experimentation can be separated into two distinct types of data: qualitative and quantitative. Quantitative data deals primarily with numerical characteristics, such as the weight or amount of a particular substance.
Gently stir the resulting mixture for 30-60 seconds. * Step 4 –Place a suitable filter (cloth, filter paper or a fine sieve) over an empty glass, and secure it with the rubber band. Pour the mixture into the filter. If the mixture is too thick, stir in more of the extraction solution. Leave to filter for about 10 minutes.
Take the fine soil from the bottom pan of the sieve set, place it into a beaker and add 125mL of the dispersing agent. Stir the mixture until the soil is thoroughly wet. Let the soil soak for at least ten minutes. 2. While the soil is soaking, add dispersing agent into the control cylinder (Sodium Hexametaphosphate 125ml) and fill it with water to the mark.
Procedure: Weigh out the mixture, and then use different techniques to separate them from each other. Using the magnet to separate out iron filings, boiling the substance to separate out the sand, and filtration paper to separate the salt and benzoic acid. Once substances are separated and dried, weigh them out to receive a total amount. III. Experimental Data: The original weight of the mixture before separation was 4.6g.
Thin Layer Chromatography Introduction (Adapted from Mohrig, 1st ed., pp. 151-162.) Chromatography is a sophisticated method of separating mixtures of two or more compounds. The separation is accomplished by the distribution of the mixture between two phases: one that is stationary and one that is moving. Chromatography works on the principle that different compounds will have different solubilities and adsorption to the two phases between which they are to be partitioned.
All matter may exist in any of three physical states of matter.In the graphic on the left the solid and liquid forms of water - ice are shown. | | Physical Changes:A physical change takes place without any changes in molecular composition. The same element or compound is present before and after the change. The same molecule is present through out the changes. Physical changes are related to physical properties since some measurements require that changes be made.Melting Point: As solid matter is heated it eventually melts or changes into a liquid state at the melting point.