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CHEM 1127Q Study Guide - Final Guide: Vsepr Theory, Gravimetric Analysis, Thermal Energy

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raspberrygrasshopper669

4 May 2017

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Joseph De Pasquale

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CHEM 1127Q Full Course Notes

CHEM 1127Q Full Course Notes

Document Summary

Chem 1127q final exam study guide spring 2017 things to know . Chemistry - the study of the composition, properties, and interaction of matter. Matter - anything that has mass and occupies space: definition of chemistry and matter, three common phases of matter and their volume and shape characteristics, definition of an element, compound, and mixture along with examples of each. Solids - occupies a fixed volume and shape. Liquids - occupies a fixed volume but takes on the shape of the container. Gas - takes on the volume and shape of the container. Element - type of pure substance that cannot be broken down into simpler substances by chemical changes (ex. any element on the periodic table) Compound - pure substances that can be broken down into simpler substances by chemical changes (ex. Mixture - consists of two or more substances in varying amounts that can be separated by physical changes (ex. air: definition of an atom and molecule.

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Related Questions

1) Classify each of the following as a mixture, a compound, or an element?

table sugar, propane, bronze, tea, vinegar, dry ice, oxygen, aluminum

2) Select the statements that pertain to elements. Select all the statements that apply.
a) These can be broken down by physical means.
b) These cannot be broken down by chemical means.
c) These combine chemically to form new substances; they are building blocks of matter.
d) These are chemical combinations of simpler forms of matter.
e) These are pure substances.

3) Which of the following are chemical changes? Check all that apply.
a) sugar is dissolved in water
b) a warm coke bottle fizzes when opened
c) the copper roof turns green over time
d) baking soda is dissolved in vinegar and bubbles appear
e) a fog appears on your windshield in cold weather

4) Classify each property as physical or chemical.

a)susceptibility to rust

b) flammability

c) boiling point

d) melting point

e) conductivity

f) color

5) Which of these substances are elements? Check all that apply.

a) silicon

b) iodine

c) lead

d) quartz

e) silicone

f) water

Zinc and Copper(II) Sulfate Materials: Two test tube rack, 1 M CuSO_4 (copper(II) sulfate notation). Zn(s) For all the experiments in pans C-F, use small quantities. For solids, use the amount of compound that will fit on the tip of a spatula or small scoop. Carefully pour small amounts of liquids into your own beakers and other container. Measure out 3 ml, of water in a test tube. Use this volume as a reference level for each of the experiments. Do not place droppers or stirring rub into reagent bottles. They may contaminate a reagent for the entire class. Discard unused chemicals as indicated by your instructor. B.l Pour 3 ml. (match the reference volume) of the blue solution. 1 M CuSO_4 (one molar copper(II) sulfate), into each of two test tubes. Obtain a small piece of zinc metal. Describe the appearance of the CuSO_4 solution and the small piece of zinc metal. Add the Zn metal piece to the CuSO_4 solution in one of the test tubes. The CuSO_4 solution in the other test tube it your reference for the initial solution color. Place the test tubes in your test tube rack and observe the color of the CuSO_4 solutions and the Zn piece again at 15 and 30 minutes. Pour the CuSO_4 solutions into the sink followed by a large amount of water. Rinse the piece of zinc with water and place it in a recycling container as directed by your instructor. B.2 Balance the equation given for the reaction. The symbol (aq) means aqueous (dissolved in water). Unbalanced equation: Zn(s) + CuSO_4(aq) rightarrow Cu(s) + ZnSO_4(aq) B 3 Identify the type of reaction that that occurred. Metals and HCl Materials: Three test tubes, test tube rack, small pieces of Cu(s), Zn(s), and Mg(s) metal 1 M HCl Caution: HCl it a carrot ire acid. Handle carefully! C.l Place 3 mL of I M HCl (match your reference volume from part Cu(s) in each of three test tubes. Describe the appearance of each metal. Carefully add a metal piece to the acid in each of the test tubes. Record any evidence of reaction such at bubbles of gas (H_2). Carefully pour off the acid and follow with large quantities of water to dilute. Rinse the metal pieces with water, dry, and return to your instructor C.2 Balance the equation given for each metal that gave a chemical reaction. If there was no reaction, cross out the products and write NR for no reaction. Unbalanced equations: 1.Cu(s) + HCl(aq) rightarrow CuCl_2(aq) + H_2(g) 2. Zn(s) + HCl(aq) rightarrow ZnCl_2(aq) + H_2(g) 3. Mg(s) + HCl(aq) rightarrow MgCl_2(aq) + H_2(g) C.3 Identify the type of reaction for each chemical reaction that occurred. Reactions of Ionic Compounds Materials: Three (3) test tubes, test tube rack Dropper bottle sets of 0.1 M solutions: CaCl_2, Na_3PO_4, BaCl_2, Na_2SO_4, FeCl_3, KSCN For each of these reactions, two substances will be mixed together. Describe your observations of the reactants before you mix them and then describe the products of the reaction. Look for changes in color, the formation of a solid (solution turns cloudy), the dissolving of a solid, and/or the formation of a gas (bubbling). Balance the equations for the reactions. Dispose of the solutions properly. D.1 Place 20 drops each of 0.1 M CaCl_2 (calcium chloride) and 0.1 M Na_3PO_4 (sodium phosphate) into a test tube. Describe any changes that occur. Identify the type of reaction for each chemical reaction that occurred. Unbalanced equation: CaCl_2(aq) + Na_3PO_4(aq) rightarrow Ca_3(PO_4)_2(s) + NaCl(aq).