Packet for Cu lab, naming and writing formulas, reaction types and ...

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$KINDERGARTEN EVERYDAY MATH – BASELINE RUBRIC$

Copper lab Introduction: Chemical reactions are often accompanied by a formation of a precipitate, production of gas (known as evolution of gas in chemistry), change in color, or a pronounced temperature change. You will observe all these evidences for chemical change in a series of laboratory experiments that will span several days. You will begin with the copper and end with the same element, but on the way you will make it react with different compounds. You will also learn to write chemical formulas that show the changes copper undergoes during these reactions, several laboratory techniques and terminology. Purpose: • To recognize that production of gas, change in color, formation of a precipitate, or the evolution of heat are often associated with chemical changes. • To study changes of copper as it goes through a cycle of several reactions. • To practice writing proper chemical formulas, using the reactions of copper as examples. Be very careful when working in the lab and wear goggles at all times, since you will be using dangerous chemicals. Your teacher will show you how to dispense the nitric acid (HNO3) at the extraction hood. Take this opportunity to record HNO3 appearance in your observations section. Changing Cu to Cu(NO3) 1. Wear goggles and closed toe shoes 2. Go to a weighting station, tare the plastic container and take approximately 1.5 g of copper. Place the Cu in a 400 ml beaker Write here the exact amount of copper you obtained:______________________________ 3. Record Copper’s appearance in your observation section 4. Go to the extraction hood where you will carefully add 20 ml of nitric acid to the copper according to your teacher’s instructions 5. Place a watch glass on top 6. Take your beaker to your lab table and place it over white paper. Write your observations of the reaction. Observations Observations before reaction • Cu: Observations during and after the reaction • During reaction: • HNO3: • After reaction: You will continue to work with the copper nitrate in another class. Answer the following questions: A. What evidence of chemical change did you observe? ________________________________________________ ____________________________________________________________________________________________ B. Look at your classmates’ beakers after the reaction. Describe any significant difference or similarities: ____________ _____________________________________________________________________________________________ C. If the same happened in all of the beakers, why does Cu always form the same compound when mixed with HNO3? _____________________________________________________________________________________________
SECOND DAY We will continue working with the solution you generated last class, but before we go ahead we need to introduce several terms. Write in the spaces below the definitions given by your teacher. Important Terms to Know: Endothermic:_______________________________________________ Exothermic: _______________________________________________ Reactants: ________________________________________________ Products:__________________________________________________ Precipitate: _______________________________________________ (s): ______________________________________________________ (l):_______________________________________________________ (g):______________________________________________________ (aq): _____________________________________________________ Writing chemical formulas During our last experiment we observed the reaction written below. Write the reaction in symbols: Pieces of copper with nitric acid, HNO3 (aq) to get copper (II) nitrate and nitrogen dioxide gas a. Now circle the reactants, and put a square around the products. Remember to label each reactant and product as (s), (l), (g), or (aq). We will now continue working with the copper II nitrate solution. Be sure to wear your goggles! Procedure: 1) Measure 20mL of the copper (II) nitrate with a graduated cylinder and pour it on a 200mL beaker. 2) Measure 20mL of sodium hydroxide solution, NaOH (aq) from the squeeze bottle in the extraction hood and pour on a 50 ml beaker.
Page 1: Learning Goals Unit 4: Copper lab,
Page 5 and 6: Observations before reaction Observ
Page 7 and 8: Next reaction 3) Put a pre-cut piec
Page 9 and 10: 1) Percent recovery is a term used
Page 11: Describe with words any observed pa
Page 14 and 15: Write the group # the ions are in o
Page 16 and 17: Practice Writing Formulas with the
Page 18 and 19: Practice makes perfect! The third r
Page 20 and 21: Naming chemical compounds Now that
Page 22 and 23: It is your turn to practice. The fo
Page 24 and 25: Identification of elements, ions an
Page 26 and 27: Chemical Change Lab - Five Fabulous
Page 28 and 29: 3. How many products are present an
Page 30 and 31: What type of reaction is this? Ther
Page 32 and 33: Practice identifying types of react
Page 34 and 35: B. Heating of a metallic chlorate:
Page 36 and 37: compound1 + compound2 Compound3 + c
Page 38 and 39: 3. The reaction of hydrogen and nit
Page 40 and 41: Follow the instructions for previou
Page 42 and 43: Types of Reactions Combination: A +
Page 44 and 45: Decomposition subtypes When there i
Page 46: 6. Describe how to use gravity filt

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