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Topic: Multivalent Metals and Polyatomic Ions

Grade 10 : Chemistry. Topic: Multivalent Metals and Polyatomic Ions. Date: Thursday, March 21 st , 2013. Puzzlers. Courtesy of Mr. Luoma. Element of the Day. Element of the Day. What element do rat poison, laundry detergent, and Silly-Putty all have in common?. Element of the Day: Boron.

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Topic: Multivalent Metals and Polyatomic Ions

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  1. Grade 10: Chemistry Topic: Multivalent Metals and Polyatomic Ions Date: Thursday, March 21st, 2013

  2. Puzzlers Courtesy of Mr. Luoma

  3. Element of the Day

  4. Element of the Day • What element do rat poison, laundry detergent, and Silly-Putty all have in common?

  5. Element of the Day: Boron • Atomic Number: 5 • 5 Proton, 5 Electron • Atomic Weight: 10.811 • Location: Group 13 • Metalloid • Hard • Resistant to heat

  6. Element of the Day: Boron • Why is Boron cool to learn about? • Combined with Nitrogen, boron nitride crystals are created, which are almost as hard as diamonds. • Essential nutrient to all green plants • Silly-Putty: • Soft and moldablein your hands • Hard and bouncy when you throw it against the wall

  7. Element of the Day: Boron • Boric Acid flames: • Green flames are produced when you burn boron • http://www.youtube.com/watch?v=BevctrjVPjA • Green Flames from Pinecones: • http://www.youtube.com/watch?feature=endscreen&v=cXhX68qr5wY&NR=1

  8. Multivalent MetalsClass Questions • 1. Write the formula for the compound formed by each pair of elements. • a. gold(III) and nitrogen  • b. copper(II) and sulfur • c. tin(II) and chlorine  • d. lead(IV) and oxygen  • 2. Write the names of the following binary ionic compounds. • a. AuCl3 • b. PbO2 • c. Cu2O  • d. AsCl3

  9. Polyatomic Ionic CompoundsClass Questions • 1. Use the table of common polyatomic ions to help you name and write formulas for these compounds. Watch for multivalent ions, which require identification by a Roman numeral. For multivalent ions, write the name and formula for each form of the ion. • a. Be and PO43– • b. Sn and ClO3–  • c. Cu and NO3–  • d. NH4+and SO42– 

  10. Polyatomic Ionic CompoundsClass Questions • 2. Write the formula for each ion, and for the compound formed by each combination of ions. Use the list of common polyatomic ions to help you. • a. calcium and carbonate  • b. sodium and nitrite  • c. calcium and sulfite • d. lead(II) and phosphate 

  11. Ionic Compounds Worksheet • Complete the Ionic Compounds Worksheet • Binary Ionic Compounds • Multivalent Metals • Polyatomic Ionic Compounds • We will check the answers together in class • Make note of which questions you were having difficulty with • ASK Questions if you are having difficulties!! • A blank sheet with answers is posted on the website: • http://lcsgrade10chemistry.weebly.com/

  12. BINGO – Binary Ionic Compounds Review (if time) • See Binary Ionic Compounds Review Powerpoint

  13. Supporting Documents • ON Science 10 Textbook • Pages: 146-150 • Chapter 4 Power Point for ON Science 10 • Slides: 23-26 • Chapter 4 Notebook - none • Websites: none

  14. Homework • ON Science 10 Textbook • Page #: 150 • Questions: 9, 10 • Page #151 • Try Questions:1-8 • Read - “Ionic Compounds at Home”

  15. Homework Answers Pg. 150 • 9. • a. binary, Ni2O3 • b. binary, CuI2 • c. binary, Sn3N4 • d. binary, CrBr2 • e. binary, FeP • f. neither, LiHCO3 • g. ternary, K2SO4 • h. ternary, (NH4)3P • i. ternary, Ba(NO3)2 • j. binary, Co3(PO4)2

  16. Homework Answers Pg. 150 • 10. • a. gold(III) chloride • b. tin phosphide • c. chromium oxide • d. nitrogen sulphide • e. ammonium sulphide • f. calcium fluoride • g. iron(II) sulfite • h. magnesium phosphate

  17. Homework Answers • Pg. 151 • 1. • a. chloride • b. magnesium • c. sulfate • d. copper(II) • 2. • a. OH– • b. S2– • c. Al3+d. Cr3+ • 3. The diagram should show two potassium atoms each giving one electron to one sulfur atom, which has six electrons in its outer shell.

  18. Homework Answers Pg. 151 • 4. The tiles repeat in a regular pattern like the atoms in an ionic compound. To represent sodium chloride, there would have to be an equal ratio of black and white tiles. • 5. • a. lithium carbonate • b. ammonium nitrite • c. copper(II) oxide • 6. • a. Mg3N2 • b. Al(OH)3 • c. SnBr2 • d. NiSO4

  19. Homework Answers Pg. 151 • 7. • a. Phosphorus was used instead of the phosphate ion. Na3PO4 • b. The brackets around the nitrate ion were omitted. Ca(NO3)2 • c. The two potassium ions are needed to make the total charge zero. K2SO3 • 8.Fe2+ or Fe3+

  20. Multivalent MetalsClass Questions & Answers • 1. Write the formula for the compound formed by each pair of elements. • a. gold(III) and nitrogen AuN • b. copper(II) and sulfurCuS • c. tin(II) and chlorine  SnCl2 • d. lead(IV) and oxygen  PbO2 • 2. Write the names of the following binary ionic compounds. • a. AuCl3 gold(III) chloride • b. PbO2lead(IV) oxide • c. Cu2O copper(I) oxide • d. AsCl3arsenic(III) chloride

  21. Polyatomic Ionic CompoundsClass Questions & Answers • 1. Use the table of common polyatomic ions to help you name and write formulas for these compounds. Watch for multivalent ions, which require identification by a Roman numeral. For multivalent ions, write the name and formula for each form of the ion. • a. Be and PO43–beryllium phosphate Be3(PO4)2 • b. Sn and ClO3– i) tin(II) chlorate Sn(ClO3)2 ii) tin(IV) chlorate Sn(ClO3)4 • c. Cu and NO3–i) copper(I) nitrate CuNO3 ii) copper(II) nitrate Cu(NO3)2 • d. NH4+ and SO42– ammonium sulfate (NH4)2SO4

  22. Polyatomic Ionic CompoundsClass Questions & Answers • 2. Write the formula for each ion, and for the compound formed by each combination of ions. Use the list of common polyatomic ions to help you. • a. calcium and carbonate Ca2+ CO32-  CaCO3 • b. sodium and nitrite  Na+ NO2- NaNO2 • c. calcium and sulfiteCa2+ SO32-CaSO3 • d. lead(II) and phosphate  Pb2+ PO43- Pb3(PO4)2

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