Mixture

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    Purpose: The objective is to separate the heterogeneous mixture of salt, iron filings, and salt into each pure form using filtration, evaporation, and magnetism. Background: When separating a mixture, preferably to separate a mixture that includes a soluble liquid and a insoluble solid, filtration is the best because solid molecules are bigger than liquid molecules. A filter contains pores that are small enough to let small partials though the pores while holding back the larger particles. Magnetism is ideal for separating mixtures of two solids with one part having magnetic properties. Metals like iron have magnetic properties that is used to separate from different materials. Evaporation is applied when separating a soluble solid and a solvent. Heating the solvent will cause it to evaporate and leave the soluble solid behind because it needs more heat to reach its boiling point.…

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    Copper Sulfate Lab

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    Title: Separations of a Mixture Notes: - H¬2O, Copper Sulfate, Starch - H2O (water)- liquid, solvent, boiling point: 100 C, freezing point: 0 C. - Copper Sulfate- solid, soluble, forms an aqueous solution, is a salt. - Starch- solid, macromolecule (long chain sugar), not very soluble in water at low temperatures. - When H2O, Copper Sulfate, and starch are mixed together, it forms a heterogeneous mixture. - Aqueous solution of copper sulfate with a suspension of starch. Research Question: What…

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    A freshman taking a Dying Environment class believes that blood is a substance; however, he or she is incorrect. Substances and mixtures are both types of matter that act in different ways. A mixture is a combination of two or more substances that are not combined chemically. Furthermore, substances cannot be separated by physical means, whereas mixtures can. Because it contains many substances that can be separated through physical means after being combined, blood is a mixture instead of a…

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    Alternate Conception

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    (Alternate conception): ‘Mixtures are only used for cooking’ Year Level: 2 Students: approx. 26 Time: 40mins Context: Many younger students have only ever been exposed to the term ‘mixtures’ when referring to mixtures made in the kitchen. They often think of cakes, omelettes, pancakes; essentially anything with a ‘batter’. Students are exposed to hundreds of mixtures a day and don’t know it because they have simply never been told otherwise. This is how I believe the alternate conception I…

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    Micro Chem Lab Report

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    PdCl2 stock solution was prepared by adding water to a mixture of PdCl2 (0.10 g, 0.56 mmol), distilled water (200 mL), and 37% HCl solution (20 mL) to form 1.0 L solution. Both the stock solutions were sonicated to form clear solution. Cu2+ stock solution was prepared by adding water to a mixture of CuSO4·5H2O (5.0 g, 20 mmol), distilled water (700 mL), potassium sodium tartrate tetrahydrate (25 g, 89 mmol), and NaOH (7.0 g, 0.18 mol) to form 1.0 L…

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    spreads throughout. Some of the solute dissolves within the mixture, but the rest sinks to the bottom, the water becomes a transparent, whitish color. When mixing the mixture, the salt will spread evenly throughout and become homogenous. This is physical because nothing changed, the substances just mixed and it is able to be undone. Burning paper is a chemical reaction The lens paper is thin, crinkly, white, and easy to tear. After the paper was lit, it burnt quickly starting at the edges and…

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    Evaporation Lab

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    Purpose: We already knew that the chemical properties of each pure substance are not are not changed after separation in a mixture. The key to find a physical property that one part of the mixture does have but the parts of the mixture doesn’t. In magnetism a magnetically susceptible material is extracted from a mixture depending on a magnetic force. Filtration is separation of an insoluble solid and a liquid. Filtration depends on solubility, the filtrate is the one want to keep (liquid) and…

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    The gas bubbles was caused by the mixture of baking soda and phenol red. Though we did not have any labs in which liquid was exempt from the experiment it is something that we were looking at as a possible future trial. In the future we could mix calcium chloride with sodium bicarbonate to observe the reaction but i think that if the two were mixed without any liquid then there would not be any significant change. The reasoning is that sodium bicarbonate needs some source of liquid to create…

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    The 50-50 Mixture was the first substance that started to melt sharply. Its melting point started at 98.7 ͒C and ended at 101.5 ͒C where it was completely liquefied. This substance out of all three took the slowest to become a liquid. Urea was the second substance that started to melt at 133.3 ͒C and ended at 133.5 ͒C. Right after Urea was completely a liquid, Trans-Cinnamic acid began its melting point at 133.5 ͒C and ended at 134.2͒ C. Both Urea and Trans-Cinnamic acid took a while to begin the…

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    Earthquake Lab Hypothesis

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    water is very hot so be careful! Keep stirring until the mixture is cool enough to knead (press and squeeze and fold on a hard, lightly floured surface). Knead the dough well and then place it in the tray. To prepare the gravel model, pour dry Grape-Nuts cereal into another tray until it is about half full. To prepare the alluvium model, mix about 2-3 cups of dry Grape-Nuts cereal with about 1 cup of water and pour the mixture into another tray until it is about half full. To prepare the sand…

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