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CHEMISTRY - FINAL REVIEW

Prepare for your chemistry exam by mastering key concepts such as writing chemical formulas, naming compounds, molar mass calculations, reaction types, measurement, stoichiometry, gas laws, and more. Engage with practice problems and learn important rules for sig figs to excel in your studies. Unlock your potential in chemistry today!

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CHEMISTRY - FINAL REVIEW

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  1. CHEMISTRY - FINAL REVIEW

  2. WARM UP: What are some good ideas of things to write on your cheat sheet?

  3. UNIT 1: WRITING CHEMICAL FORMULAS Ammonium Sulfide Lead (II) Phosphate

  4. UNIT 1: NAMING COMPOUNDS NiI2 FeCrO4

  5. UNIT 1: MOLAR MASS/CHART MASS H2SO4

  6. UNIT 1: PERCENT COMPOSITION Determine the empirical formula using the following data: C: 66.6% H: 11.2% O: 22.2% Then… If the molar mass of your compound is 144.0 g/mole, what is the molecular formula of the compound?

  7. UNIT 2: REACTION TYPES Synthesis Decomposition Single Displacement Double Displacement Combustion

  8. UNIT 2: WRITING AND BALANCING CHEMICAL REACTIONS Phosphoric Acid (H3PO4) reacts to produce hydrogen gas, oxygen gas, and phosphorus solid. Write and balance the chemical reaction.

  9. UNIT 3: MEASUREMENT Read and record the following two values _________ cm ______________ mL

  10. UNIT 3: SIG FIG RULES • All non-zero digits are significant • Trailing zeros are significant if a decimal is present • Zeros that are “sandwiched” in between two significant digits are always significant • Leading zeros (or placeholder zeros) are never significant How many sig figs does 0.0002051 have?

  11. UNIT 3: MULTIPLICATION AND DIVISION - SIG FIGS • Do the math operation in your calculator. • Identify the number sig figs in each value. • Round to the least number of significant digits. 1.00 x 4.510 x 25 =

  12. UNIT 3: ADDITION AND SUBTRACTION - SIG FIGS • Line up decimals • Draw a wall at estimated digits • Round all measurements at the wall • Perform calculation 254.64 + 24.89 + 1.0 =

  13. UNIT 4: STOICHIOMETRY @ STP Mass - Mass : Coefficient Mol Want Molar Mass Want (g) = _____ g Want Given (g) 1 Mol Given Molar Mass Given (g) Coefficient Mol Given 1 Mol Want

  14. UNIT 4: STOICHIOMETRY @ STP Mass - Volume: Coefficient Mol Want 22.4 L Want = _____ L Want Given (g) 1 Mol Given Molar Mass Given (g) Coefficient Mol Given 1 Mol Want

  15. UNIT 4: STOICHIOMETRY @ STP Volume - Mass: Coefficient Mol Want Molar Mass Want (g) = _____ (g) Want Given (L) 1 Mol Given 22.4 L Given Coefficient Mol Given 1 Mol Want

  16. UNIT 4: STOICHIOMETRY @ STP Volume - Volume: Coefficient Mol Want 22.4 L Want = _____ L Want Given (L) 1 Mol Given 22.4 L Given Coefficient Mol Given 1 Mol Want

  17. UNIT 4: PERCENT YIELD A reaction with a calculated yield of 9.23 g produced 7.89 g of product. What is the percent yield for this reaction? Percent Yield = Actual yield / Theoretical yield x 100%

  18. UNIT 5: COMBINED GAS LAW A 32.0 liter sample of carbon dioxide gas is at STP. If the pressure is changed to 150.2Kpa and the volume is changed to 22.4 liters, what is the new temperature of the gas? P1V1 = P2V2 T1 T2

  19. UNIT 5: BOYLES, CHARLES & GAY LUSSAC’s LAWS Determine the pressure change when a constant volume of gas at 1.00 atm is heated from 20.0 °C to 30.0 °C. V2 V1 P1 P2 P1V1 = P2V2 = = T1 T1 T2 T2

  20. UNIT 5: IDEAL GAS LAW PV = nRT I have 7.70 moles of a gas at a pressure of 0.0900 atm and at a temperature of 56 deg C. What is the volume of the container that the gas is in? R = 0.0821 atm L / mol K R = 8.314 kPa L / mol K R = 62.4 Torr L / mol K

  21. UNIT 5: STOICHIOMETRY NOT @ STP What volume of hydrogen gas at 1000. torr and 500. °C would be needed to form 112 g Fe? 1Fe2O3 + 3H2 → 2 Fe + 3H2O

  22. UNIT 5: GRAHAM’S LAW At a certain temperature, molecules of fluorine, F2, gas travel at 0.300Km/s. What is the speed of CH2O, gas molecules under the same conditions?

  23. COME IN AFTER SCHOOL FOR EXTRA HELP

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