PoppEOC Q3

Quarter 3: 7) SC.912.P.8.9 - Mole conversions ( 9/50 questions = 20% of your EOC!!!! ) Vocabulary: chem4kids - http://tinyurl.com/5gykqx PP - http://tinyurl.com/ntj4xx3 ● Law of Conservation of mass- in a chemical reaction mass is neither created nor destroyed. ● Moles- 6.02 x 10 ^23 ● Molarity - a unit of concentration expressed as the number of moles of dissolved solute per liter of solution. ● Molar Mass - the sum of all element in a compound ● Molar ratio - the ratio of the amount in moles of one substance to the amount in moles of another substance ● Avogadro's # - 6.02 x 10 ^23 ● Stoichiometry - a section of chemistry that involves using relationships between reactants and/or products in a chemical reaction to determine desired quantitative data. ○ Limiting reactant - the reactant that gets consumed first in a chemical reaction and therefore limits how much product can be formed. ○ Excess reactant - a substance that is not wholly consumed or entirely reacted in a chemical reaction. ○ % yield - a measure of the quantity of moles of a product formed in relation to the reactant consumed, obtained in a chemical reaction, usually expressed as a percentage

Balancing Equations - http://tinyurl.com/q8ev6d4 1. __6__ H 2 + _3___ O 2 → _6___H 2 O 2. _2___ Al 2 O 3 → _2___ Al + __3__ O 2 3. _2___ KClO 3 → _2___ KCl + _3___ O 2 4. __2__ Al + __3__ Br 2 → _2___ AlBr 3 5. _3___ AgNO 3 + __1__ K 3 PO 4 → __1__ Ag 3 PO 4 + __3__ KNO 3 6. _1___ Al 2 (SO 4 ) 3 + __3__ Ca(OH) 2 → _2___ Al(OH) 3 + _3___ CaSO 4 Mole ↔ Grams Conversions: Example: 1. How many moles of carbon dioxide, CO 2 , are in a 22 gram sample of the compound? 22 grams CO 2 X __q__6.02x 10_____moles CO 2 = __3.00x10^23____ moles of CO 2 44.01 grams CO 2 2. What is the mass of 0.5 moles of carbon tetrafluoride, CF 4 ? 0.5 moles of CF 4 X_88.01________grams CF 4 = __7.30 x 10 ^-23____ grams of CF 4 6.02 x10^23 moles CF 4 3. How many moles of water are in 360 grams of water? 360 grams H 2 O X __6.02…__________ = __2.16 x 10 ^26____ moles H 2 O

1. How many atoms are occupied by 10 grams of Br 2 at STP? 10 grams Br 2 X ______160______ X ____6.02…________ = __3.76 x 10 ^22____ atoms Br 2 2. How many atoms are occupied by 44.8 L of He at STP? 44.8 L He X ____8________ X ____6.02…________ = __3.37 x 10 ^24____ atoms He 3. What volume, in liters, is occupied by 1.5 x 10 23 atoms of argon gas (Ar) at STP? 1.5 x 10 23 atoms X ___6.02…_________ X ____22.4________ = __5.58____ Liters Ar 4. What mass, in grams does 12.04 x 10 23 atoms of Carbon weigh at STP? 12.04 x 10 23 atoms C X __6.02…__________ X ___12_________ = ___24.7___ g C Molarity Conversions: Example : Concentration Simulation - http://tinyurl.com/k346tyn Molarity Simulation- http://tinyurl.com/pm6nwjn 1. What is the molarity of a solution in which 51 grams of aluminum oxide, Al 2 O 3 , is dissolved in 500 mL of solution?

51 grams Al 2 O 3 X ___6.02 x 10^23_________ = __3.0 x 10 ^25____ moles Al 2 O 3 500 mL X ___22.4_________ = __11200____ Liters Al 2 O 3 MOLARITY = _2.6_____ moles Al 2 O 3 Liters Al 2 O 3 2. A solution with a volume of 250 mL contains 10 grams of hydrogen fluoride, HF. What is the molarity of the solution? 10 grams HF X _____20_______ = ___200___ moles HF 250 mL X ___22.4_________ = __5600____ Liters HF MOLARITY = __.03____ moles HF Liters HF 3. What mass of Na 2 SO 4 is needed to make 2.5 L of 2.0M solution? Stoichiometry : 1. How many grams of oxygen are required to burn 48.8 liters of ethane gas, C 2 H 6 at STP? 2 C 2 H 6 ( g ) + 7 O 2 ( g ) → 4 CO 2 ( g ) + 6 H 2 O ( g ) Given Find 48.8 L C 2 H 6 X 1 mole C 2 H 6 X _ _7 __mole O 2 X _32___grams O 2 = __244____ grams O 2 22.4 L C 2 H 6 2 mole C 2 H 6 1 mole O 2 2. . How many grams of water can be prepared from 8 grams of hydrogen at STP? 2 H 2 ( g ) + O 2 ( g ) → 2 H 2 O Given Find

Stoichiometry : % yield 8) SC.912.P.12.10 - Gases & KMT ( 3/50 questions) KMT PP - http://tinyurl.com/lxsn2r9 Vocabulary: ● @ STP 1 mole = ____6.02 x 10^23____________ atoms = ___22.4______ Liters ● Kinetic Molecular Theory Postulates : http://tinyurl.com/dg2a9w 1. the particles in a gas are in constant, random motion 2. the combined volume of the particles is negligible 3. the particles exert no forces on one another 4. any collisions between the particles are completely elastic 5. the average kinetic energy of the particles is proportional to the temperature in kelvins ● What causes pressure ? Compression of molecule in a limited space

● Temperature is a measure of ? the average kinetic energy of the particles in a substance. ● What is Absolute Temperature? Kelvin Scale = K Celsius = C Freezing Water ? +273ºK 0 Evaporating Water ? 373 kelvin. 100° C Explain the Gas Law Relationships PP - Gas Laws http://tinyurl.com/nxxn7m3 Pressure vs Volume ( http://tinyurl.com/phurqe3 ) Boye’s law P1V1=P2V2 Pressure and volume have an indirect relationship Volume vs Temperature ( http://tinyurl.com/owde33l ) Charles's law V1/T1=V2/T2 Volume and temperature have a direct relationship Pressure vs Temperature ( http://tinyurl.com/n2xehnv ) Gay-Lussac law P1/T1=P2/T2 Pressure and temperature have a direct relationship Combined Gas Law: Temperature has to be in KELVINS !!!

.39 9) SC.912.P.10.7 - Heat ( 2/50 questions) Exothermic vs Endothermic ? PP - http://tinyurl.com/qyfr2of Exo or Endo ? Exo or Endo ? Vocabulary: ● Δ H (Heat or Enthalpy) - change in heat or enthalpy ● Exothermic (- Δ H) : means energy exits the system into the surrounding ● Endothermic (+ Δ H) : means energy enter the system from the surrounding ● Activation Energy - the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport. Interactives: 1. Heating Curve 2. Heating Curve Label the Chart: Solid Liquid Gas Melting Condensation Freezing Boiling Exothermic or Endothermic ? Boiling - Condensation - Melting - Freezing -

Scenario Exothermic vs Endothermic ? Ice melting endo Gas vapor condensing into liquid endo Liquid vaporizing (boiling) into a gas exo Liquid freezing endo Hot pack exo Cold pack endo ( - H) or Negative change in Enthalpy ? exo ( + H) or Positive change in Enthalpy ? endo 10) SC.912.P.10.1 - Heat Transfer ( 3/50 questions) Specific Heat - http://tinyurl.com/a3q6qtn Heat Curve for water - Heating Curve & Heating Curve Vocabulary: ● Conservation of Energy (system vs surroundings)- matter cannot be created or destroyed. ● Specific Heat Capacity - the amount of heat needed to raise the temperature of 1 gram of a substance 1 degree Celsius (°C). ○ Specific Heat Capacity (C) of water? 4,184 Joules of heat (1 kilocalorie) for the temperature of one kilogram of water to increase 1°C. ● Temperature - the average kinetic energy of all the atoms or molecules of that