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Unit 5 Test Review

Unit 5 Test Review. What is the Law of Conservation of Mass?. In any reaction mass is conserved Mass of reactants = mass of products. Describe fusion. 2 or more nuclei combine to form a larger nuclei. Describe fission. nuclei split into fragments when struck by neutrons.

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Unit 5 Test Review

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  1. Unit 5 Test Review

  2. What is the Law of Conservation of Mass? • In any reaction mass is conserved • Mass of reactants = mass of products

  3. Describe fusion • 2 or more nuclei combine to form a larger nuclei

  4. Describe fission • nuclei split into fragments when struck by neutrons

  5. The reactants and products of complete combustion of a hydrocarbon CxHx would include • H2O • CO2 • O2

  6. The reactants and products of a decomposition reaction would include • A single reactant that is an ionic or molecular compoound • Have multiple products

  7. What type of reaction occurs when magnesium reacts with aluminum chloride? • Single replacement

  8. The reactants and products of a synthesis reaction would include • Multiple reactants and a single product

  9. The reactants and products of a single replacement reaction would include • A single element and a compound

  10. What will happen to the rate of reaction if you increase the concentration of the reactants? • It will increase

  11. What will happen to the rate of reaction if you increase the temperature? • The rate will increase

  12. What is activation energy? • The amount of energy needed for a reaction to occur

  13. What is a catalyst? • A substance that when added to a reaction, will increase the rate of the reaction without being used up

  14. What are enzymes? • Proteins in the body that act as catalysts for biological processes

  15. What is a limiting reactant? • When there are more than 1 reactants - • the one that gets used up first and limits that amount of product possible

  16. Identify the parts of a reaction • Coefficient • Reactant • Separates reactants or products • seperates reactants from products • Tells the state of the substance • product

  17. What is an endothermic reaction? A reaction in which energy is absorbed

  18. What is an exothermic reaction? • A reaction in which energy is released

  19. Identify the following reaction as:synthesis, decomposition, single-displacement, double displacement, or combustion NaNO3 (s)  NaNO2 (s) + O2 (g) decomposition

  20. Identify the following reaction as:synthesis, decomposition, single-displacement, double displacement, or combustion FeS (s) + HCl (aq)  FeCl2 (aq) + H2S (g) double displacement

  21. Identify the following reaction as:synthesis, decomposition, single-displacement, double displacement, or combustion CO (g) + O2 (g)  CO2 (g) + H2O (g) combustion

  22. Identify the following reaction as:synthesis, decomposition, single-displacement, double displacement, or combustion Al (s) + S (s)  Al2S3 (s) synthesis

  23. Identify the following reaction as:synthesis, decomposition, single-displacement, double displacement, or combustion KI (aq) + Cl2 (g)  KCl (aq) +I2 (aq) single displacement

  24. Write a balanced chemical equation for the following reaction sodium metal will combine with oxygen in dry air to form solid sodium oxide 4Na (s) + O2 (g)  2Na2O (s)

  25. Balance the following equation AlCl3 (aq) + NaOH (aq)  NaCl3 (aq) + AlOH (s) AlCl3 (aq) + NaOH (aq)  NaCl3 (aq) + AlOH (s)

  26. Balance the following equation Ca (s) + 2H2O (l)  CaOH2 (aq) 2Ca (s) + 2H2O (l)  2CaOH2 (aq)

  27. What are the reactants in a double replacement reaction? • 2 ionic compounds

  28. In the equation 2K (s) + 2H2O (l)  2KOH (aq) + H2 (g), what is the physical state of each reactant and product? reactantsproducts K – solid KOH – aqueous solution H2O – liquid H2 - gas

  29. Write a balanced chemical equation for the following reactionaluminum metal + hydrochloric acid aluminum chloride solution + hydrogen 2Al + 6HCl 2AlCl3 + 3H2

  30. Chem I - done • Chem I honors continue

  31. Determine the oxidation numbers of all elements of the following substances Al = 0

  32. Determine the oxidation numbers of all elements of the following substances Ca2+ = +2

  33. Determine the oxidation numbers of all elements of the following substances PO42- P = +6 O = -2

  34. Determine the oxidation numbers of all elements of the following substancesC2H6O C = -2 H = +1 O = -2

  35. For the following redox reaction determine the element that is oxidized, reduced, the oxidizing agent, and the reducing agentH2C2O4 + K2MnO4 CO2 + K2O + Mn2O3 + H2O • C - +3  +4 = lose 1 e- = oxidized, reducing agent • Mn +6  +3 = gain 3 e- = reduced, oxidizing agent

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