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Chemical Change Lab

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I. Purpose: To recognize and differentiate between physical and chemical changes in matter. II. Materials: The materials used in this experiment are a birthday candle, test tubes, test- tubes tongs, laboratory burner, test- tube rack (wooden or metal- wooden used in this experiment), matches, piece of paper 2 cm x 2cm, watch glass, tap water, sodium chloride (NaCI), magnesium (Mg) ribbon, copper sulfate pentahydrate (CuSO45H2O), iron fillings (Fe), powdered sulfur (S), magnet and micropipets- with silver nitrate (AgNO3), 0.1 M and with hydrochloric acid (HCI), 6.0 M. III. Procedure: As follows in Mrs. Lubin’s Lab Page, Canvas, Chemistry H, Physical and Chemical Changes. IV. Data: See attached data table. V. Analysis: 1) One possible indication that a chemical change occurred was when adding hydrochloric acid (HCI) to magnesium (Mg). When added, the generation of bubbles occurred, gas rose form the test tube, and the temperature changed to hot. This is chemical change because the state of matter changed for magnesium. Another indication of a chemical change in this experiment was burning candle wax. This is a chemical change because flammability was present, which changed the identity of the candle stick. 2) …show more content…

For example, if the candle wax was only heated a little, then the color would slightly turn brown/black, which is an intensive physical property. An extreme color change must occur in order for it to be a chemical change. Substances in a mixture can be separated with a magnet. In this investigation, iron and sulfur were mixed together. A magnet was used to observe that iron is magnetic and can be separated from sulfur, when together in a mixture. Also, substances can be separated with the combination of another type of substance that splits them apart such as the silver nitrate to the NaCl and water

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The new mixture that was created was a chemical change because it changed the substance and it now has new

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These changes are made when matter is separated, mixed, or moved by physical means. Another example of physical change is distillation, which we showed in a lab by boiling a green mixture to distill water from the substance. Physical changes normally take place with

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Abstract In this lab we separated a mixture to observe the methods of separating substances from one another using a series of techniques. In this lab we used magnetism, filtration, and evaporation to successfully separate the mixture into three separate components. Throughout the experiment we learned that mixtures are two or more substances combine and each substance retains its own properties and chemical identity.

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In this experiment, the student was presented with five of the most common types of chemical reactions and practiced balancing chemical equations. Additionally, the student went through an extensive list of chemical reactions was asked to classify the chemical reactions and balance them. In particular, the student was asked to do this for the reactions of: mixing 3 mL calcium chloride with 2 mL sodium phosphate, adding a few drops of water to a test tube containing 0.5 g copper sulfate, heating 0.5 g of copper(II) hydroxide in a test tube, adding a square piece of zinc to a test tube containing 3 mL 3M hydrochloric acid, mixing 2 mL 3M hydrochloric acid with 2 mL sodium carbonate, adding 0.1 g MnO2 to a test tube with 3 mL hydrogen peroxide, combusting a sodium acetate and ethanol solution, mixing 3 g ammonium chloride and 7 g strontium hydroxide octahydrate together and swirling the solution, mixing 2 mL sulfuric acid and 4 mL sodium hydroxide together,

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