Chemistry Final - Practice Test

Chemistry Final 2013–Semester 1 Review Guide

1. Classification of Matter

1. Define the following:

1. Elements:______

1. Compound: ______

1. Mixture: ______

1. What is the difference between homogeneous and heterogeneous mixtures?

1. Identify the following as an element (e), compound (c), or mixture (m):

Substance / E, C or M
As
NaCl
Sand + Water
S
Air

1. State the Law of Conservation of Matter:

1. State the Law of Definite Proportions:

1. Which of the following indicate a chemical change:

(a)Fizzing(c) Color change

(b)Burning(d) All of the above

1. Which of the following are physical changes:

(a)State of changes (solid, liquid, gas)(c) Cracking open an egg

(b)Dissolving(d) All of the above

1. If 30g of KCl are added to 136g of water the resulting mass is ______.

1. Laboratory Safety

1. When should long hair be tied back?

1. When chemicals are spilled what should you do?

1. Numbers in Chemistry

1. Answer the following calculations to the correct number of significant figures:
2. 3.0 x 2.30 = ______What’s the rule? ______

1. 2.3 + 3.44 =______What’s the rule? ______

1. 3.44 x 2.0 + 3.9______

1. Convert the following into scientific notation:

1. 0.0035 ______

1. 43,025 ______

1. 1______

1. 0.01______

1. Express the following in standard (regular) notation:

1. 3.6 x 104______

1. 4.9 x 10-2______

1. How many significant figures do the following numbers have?

1. 0.00321______

1. 320001______

1. 1.0000______

1. .00210______

1. There are 60 seconds per minute, 60 minutes per hour, 24 hours per day and 365 days per year. How many seconds are in a 3years?

1. If 3.784 liters = 1 gallon, how many liters are in 4 gallons?

1. A field goal kicker who makes 20/21 field goals through the center of the uprights has:

(a)poor accuracy but good precision(c) poor accuracy and poor precision

(b)good accuracy and good precision(d) good accuracy and poor precision

1. What is the formula for density? What is the unit for density?(Draw the density triangle)

1. An unknown metal has the mass of 2.5g and a volume of 0.48mL. What is its density?

1. If the density of a substance is 25g/mL, what is the volume occupied by 300g of the substance?

1. Define qualitative and quantitative measurements. Give an example of each.
2. Quantitative measurement:______

1. Qualitative measurement:______

1. What would be the best metric unit for measuring the diameter of a dime?

______

1. Atomic Structure

1. What was the contribution to chemistry by each of these individuals?
2. Neils Bohr ______

1. Henry Moseley ______

1. Rutherford ______

1. JJ Thomson ______

1. Schrodinger ______

1. Democritous ______

1. Dalton ______

1. Chadwick ______

1. De Broglie ______

1. Millikan______

1. An atomic number is the same as the number of:

(a)Neutrons

(b)Electrons

(c)Alpha particles

(d)Protons

1. An atom is defined as the smallest part of an element that:

(a)Has protons, neutrons, and electrons

(b)Has protons and neutrons

(c)Retains the chemical identity of that element

(d)Can form an ion

1. The atomic number (# of protons) and mass of chlorine are?

(a)17, 35

(b)33, 75

(c)16, 32

(d)29, 64

1. The neutrons of an atom are found:

(a)In the nucleus

(b)Orbiting the nucleus

(c)In the s block

(d)In the orbitals

1. Which subatomic particle has the smallest mass?

(a)Protons

(b)Neutrons

(c)Electrons

(d)Ions

1. The number of protons always equals the number of ______in a neutral atom.

1. The mass number of an element tells you the # of ______and ______

1. Who is credited with discovering:

1. The nucleus? ______
2. The electron? ______
3. The Planetary Model of the Atom? ______

1. Isotopes have the same number of ______but different numbers of ______and different atomic______.

1. Periodic Table and Periodic Trends

1. Define these termsAND draw arrows to represent how these trends increase across the period and within each group:

1. Atomic Radius:

1. Ionization Energy:

1. Electronegativity:

1. Where can you locate the metals, non-metals, metalloids, alkali metals, alkaline earth metals, transition metals, halogens and noble gases on the periodic table?(HINT: Draw a diagram to help!)

1. Ionic and Covalent Bonding

1. Naming Ionic Compounds
2. NH4Cl______

1. Fe(NO3)3 ______

1. Cu3P ______

1. Al(CN)3______

1. Pb(SO4)2 ______

1. Formula of Ionic Compounds
2. lead (II) nitride______

1. silver bromide ______

1. chromium (VI) phosphate ______

1. vanadium (V) sulfide ______

1. potassium bicarbonate______

1. Naming Covalent Compounds
2. IO2 ______

1. C2Br6 ______

1. BBr3 ______

1. N2O3______

1. Formula of Covalent Compounds
2. tetraphosphorus triselenide ______

1. disilicon hexabromide ______

1. diselenium diiodide ______

1. tetrasulfur dinitride______

1. Naming Gases
2. What are the seven diatomic molecules (names and formulas)?

1. Chemical Reactions

1. Provide a descriptionand pattern for each type of chemical reaction.

1. Combustion Reaction

1. Synthesis Reaction

1. Decomposition Reaction

1. Single Replacement Reaction

1. Double Replacement Reaction

1. Identify the type of chemical reaction using the following chemical equations. BALANCE.

a. ____ Mg + ____ Fe2O3 ____ Fe + ____ MgO Type of Reaction: ______

b. ____ C2H4 + ____ O2 ____ CO2 + ____ H2O Type of Reaction: ______

c. ____ PbSO4 ____ PbSO3 + ____ O2Type of Reaction: ______

d. ____ H2O+ ____ SO3 ____ H2SO4Type of Reaction: ______

e. ____ H2SO4 + ____ NH4OH  ____ H2O + ____ (NH4)2SO4 Type of Reaction: ______

1. Predicting Products and Chemical Reactions

1. Identify the type of reaction, predict the products and write a balanced chemical equation.

1. __Na + __Cl2______

Type of Reaction: ______

1. ___KI______+ ______

Type of Reaction: ______

1. ___Zn + ___Cu2(SO4)3______+ ______

Type of Reaction: ______

1. ___NaOH + ___H2SO4 ______+ ______

Type of Reaction: ______

1. ___C2H6 + ___O2 ______+ ______

Type of Reaction: ______

1. Definitions

1. Chemical Reaction

______

1. Balanced Chemical Equation

______

1. What is always equal on each side of the arrow in a balanced chemical equation?

1. How many atoms are represented in the formula for Cr(CO3)3?

1. Where are reactants and products found in a chemical equation?

1. Percent Composition (Percent by Mass):

1. What is the equation for percent by mass?

1. What is the percent by mass of each element in CuSO4?

1. What is the percent by mass of each element in H3PO4?

1. General Review

1. Convert the following metric units: (K H D B d c m)

1. 1L = ______mL

1. 100cm =______m

1. 2735cg =______g

1. 0.25 KL =______mL

1. 3.25 g = ______Hg

1. WhichSI unit is used to measure:

1. Mass?______

1. Volume?______

1. Length?______

1. Temperature? ______

1. In normal processes can total energy be created or destroyed?

1. Label physical orchemical change for the following:
2. A change in color______

1. Phase change______

1. Formation of a new substance______

1. Change in density______

1. Circle ALLthe chemical changes below:
2. Burning paper
3. Melting Ice
4. C6H12O6 + H2O  C6H12O6 + H2O
5. Ca + H2O  CaO + H2

1. Identify the following as an element, compound, or mixture.

a. ______b.______c.______d.______

1. Separation Techniques

1. Identify the separation technique used in the following:
2. A process used to separate sand and water

______

1. An electrical process that can separate water into hydrogen and oxygen gas

______

1. Boiling a chemical and then condensing its vapors

______

1. A solution is left sitting on the counter. After several days only a solid remains in the container

______

1. Describe the separation technique that could be used to separate each of the following mixtures:
2. Two colorless liquids

______

1. Colored dye or ink

______

1. A non- dissolving solid mixed with a liquid

______

1. Atomic Structure

1. How do you write a complete chemical symbol for an atom? DRAW A DIAGRAM.

1. If an atom has 14 protons, 15 neutrons and, 14 electrons; its complete chemical symbol would be:

1. If an atom has 8 protons, 8 neutrons, and 10 electrons, its complete chemical symbol would be:

1. If an atom has 13 protons, 14 neutrons, and 10 electrons, its complete chemical symbol would be:

1. If an atom has 11 protons, 12 neutrons, and 10 electrons, its complete chemical symbol would be:

1. What is the electron configuration (1s22s2, etc.) for the following atoms:

Long HandNoble Gas Conf.

1. Co ______

1. N ______

1. Al ______

1. Ca ______

1. S ______

1. Ar ______

1. What is the orbital diagram for the following atoms:

1