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Unit 6 Test Review

Unit 6 Test Review. Chemistry Mrs. Martin 12-13. Have your periodic table, reactivity series and calculator ready. Determine if the following is a chemical or physical change. Ripping paper Burning wood Rolling out dough for cookies Dry ice subliming ( solid  gas). Physical change.

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Unit 6 Test Review

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  1. Unit 6 Test Review Chemistry Mrs. Martin 12-13

  2. Have your periodic table, reactivity series and calculator ready.

  3. Determine if the following is a chemical or physical change. • Ripping paper • Burning wood • Rolling out dough for cookies • Dry ice subliming ( solid  gas) Physical change Chemical change Physical change Physical change

  4. Determine if the following are elements, compounds or mixtures. If they are mixtures, tell if they are homogeneous or heterogeneous. 5. Iron wire 6. Salt water 7. Glucose (C6H12O6) 8. Pizza 9. Iron mixed with copper (II) sulfate element Homogeneous mixture Compound Heterogeneous mixture Heterogeneous mixture

  5. 6CuSO4 10. What is the coefficient? 11. What is the subscript? 12. How many atoms of copper are there? 13. How many atoms of oxygen are there? 6 4 6 24

  6. KI (aq) + Pb(NO3)2(aq)  2KNO3 (aq) + PbI2 (ppt) 14. What does (aq) stand for in the reaction above? 15. What does (ppt) stand for in the reaction above? Aqueous – in solution Precipitate – solid formed

  7. Balance the following reactions 16. _____ NaClO3 _____ NaCl + _____ O2 17. ___ Pb(NO3)2 + ___ NaCl___ PbCl2 + ___ NaNO3 18. ___ HCl + ___ CaCO3___ H2O + ___ CO2 + ___ CaCl2 2 3 2 2 2 2

  8. Balance and determine what type of reaction is present. 19.___ Fe + ___ H2O ___ Fe3O4 + ___ H2 20. ___ Al2(SO4)3 + ___ Ca(OH)2___ Al(OH)3 + ___ CaSO4 21. _____ KClO3 _____ KCl + _____ O2 4 3 4 Single replacement 3 2 3 Double replacement 2 2 3 Decomposition

  9. 22. Write the balanced reaction including states of matter. Aluminum bromide solution is combined with chlorine gas to form aqueous aluminum chloride and bromine gas. 2AlBr3 (aq) + 3Cl2 (g)  2AlCl3 (aq) + 3Br2 (g) You need to know your natural diatomics: H2, N2, O2, F2, Cl2, Br2, I2

  10. Predict the products and balance the reaction. 23. (decomposition) PBr3 24. (synthesis) Al + S  25. (combustion) C4H10 + O2  2PBr3  2P + 3Br2 2 Al + 3 S  Al2S3 2C4H10 + 13O2  8CO2 + 10H2O

  11. Predict the products and balance the reaction. If the reaction won’t happen, write NR for no reaction. 26. (single replacement) Fe + NaBr 27. (double replacement) Ca(OH)2 (aq) + HF (aq)  NR – Iron is below sodium on the reactivity series Ca(OH)2 (aq) + 2HF (aq)  2H2O (l) + CaF2 (aq)

  12. Predict the products and balance the reaction. If the reaction won’t happen, write NR for no reaction. 28. (single replacement) Zn + H2CO­3 29. (double replacement) NaC2H3O2 (aq) + H2SO4(aq)  Zn + H2CO3 H2 + ZnCO3 NR – Na2SO4 and HC2H3O2 are both soluble

  13. Good Luck on Your Test

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