1. Unit 6 Test Review

2. Electronegativity Know the Definition of Electronegativity Know the Definition of Electronegativity  The relative attraction of the electrons in a chemical bond Know the Periodic Table Trends Know the Periodic Table Trends  Left to Right – Increases  Top to Bottom - Decreases Atomic Radii Trends Atomic Radii Trends  Left to Right – Decreases  Top to Bottom – Increases

3. #1-3 #1 Which of the following elements is the most electronegative? #1 Which of the following elements is the most electronegative?  C) Fluorine (F) #2 Which one of these statements is true? #2 Which one of these statements is true?  B) Atoms with a smaller radii are more electronegativity #3 The periodic Trend for Electronegativity Values. #3 The periodic Trend for Electronegativity Values.  B) Decreases going down, increases across

4. Polarity Polar Polar  Unequal pull between the shared electron(s) Non Polar Non Polar  Equal pull between the shared electron(s)

5. #4-7 #4 Which molecule is polar? #4 Which molecule is polar?  A) Water #5 Which molecule has a nonpolar bond? #5 Which molecule has a nonpolar bond?  D) Ozone O 3 #6 Which of the following is a polar covalent bond? #6 Which of the following is a polar covalent bond?  G) C=O #7 Which type of bond is formed between the two N atoms in N 2 gas? #7 Which type of bond is formed between the two N atoms in N 2 gas?  G) Nonpolar Covalent

6. Mole Conversions Always use the Balanced Equation Always use the Balanced Equation Remember that you have to convert to moles FIRST before using a ratio Remember that you have to convert to moles FIRST before using a ratio Want Want Given Given

7. #8-9 #8 How many moles of ammonia are produced from 3 moles of nitrogen gas? #8 How many moles of ammonia are produced from 3 moles of nitrogen gas?  N 2 + 3H 2  2NH 3  3 x 2 = 6 (C ) 1 #9 How many grams of fluorine gas are required to react with 14.0 g nitrogen gas? #9 How many grams of fluorine gas are required to react with 14.0 g nitrogen gas?  N 2 + 3F 2  2NF 3  14g N 2 =.5 mole N 2 .5 x 3 = 1.5 moles Fluorine = 57 grams Fluorine 1 (C) 1 (C)

8. Reaction Types 10 a) SO 2 + H 2 O  H 2 SO 3 10 a) SO 2 + H 2 O  H 2 SO 3  Synthesis b) 2N 2 O 5  2N 2 + 5O 2 b) 2N 2 O 5  2N 2 + 5O 2  Decomposition c) Na 2 SO 4 + Pb  PbSO 4 + 2Na c) Na 2 SO 4 + Pb  PbSO 4 + 2Na  Single Replacement d) KOH + HNO 3  KNO 3 + H 2 O d) KOH + HNO 3  KNO 3 + H 2 O  Double Replacement

9. Reaction Types 11 a) 2CrCl 3 + 3I 2  2CrI 3 + 3Cl 2 11 a) 2CrCl 3 + 3I 2  2CrI 3 + 3Cl 2  Single Replacement b) 2KClO 3  2KCl + 3O 2 b) 2KClO 3  2KCl + 3O 2  Decomposition c) 2Al + 3CuCl 2  3Cu + 2AlCl 3 c) 2Al + 3CuCl 2  3Cu + 2AlCl 3  Single Replacement d) Al 2 O 3 + 3H 2 S  Al 2 S 3 + 3H 2 O d) Al 2 O 3 + 3H 2 S  Al 2 S 3 + 3H 2 O  Double Replacement

10. Like Dissolves Like Polar Substances dissolve in Polar Substances. Polar Substances dissolve in Polar Substances. Nonpolar Substances dissolve in Nonpolar Substances. Nonpolar Substances dissolve in Nonpolar Substances.

11. #12 - 13 #12 Oil does not dissolve in water because #12 Oil does not dissolve in water because  D) Water is polar and oil is nonpolar #13 Which of the following will not dissolve in water? #13 Which of the following will not dissolve in water?  C) I 2

12. Separating Ink #14 Which method would be best for separating the pigments in ink? #14 Which method would be best for separating the pigments in ink?  B) paper chromatography (B)

13. Gas Laws Charles’ Law Charles’ Law  V1 = V2 T1 = T2 T1 = T2 Boyle’s Law Boyle’s Law  P 1 V 1 = P 2 V 2

14. #15-16 #15 When a 10.0 L sample of CH 4 is heated from 200K to 400 K and pressure remains constant, the volume of gas is… #15 When a 10.0 L sample of CH 4 is heated from 200K to 400 K and pressure remains constant, the volume of gas is…  10.0/200 = V/400  V = 20.0 L The volume doubles (C) # 16 Which mathematical relationship remains constant? # 16 Which mathematical relationship remains constant?  P X V (A)

15. Solubility Curves Skip these for now, we’ll use the overhead Skip these for now, we’ll use the overhead

16. Kelvin 0 degrees Celsius = 273 Kelvin 0 degrees Celsius = 273 Kelvin #21 A liquid sample has a temperature of 40 degrees C, what is the temperature in Kelvin? #21 A liquid sample has a temperature of 40 degrees C, what is the temperature in Kelvin?  40 + 273 = 313 K (D)

17. STP Moles to Liters 22.4 Liters in 1 mole (no matter what the compound is) 22.4 Liters in 1 mole (no matter what the compound is) #22 at STP what is the volume of 51.0 grams of NH 3 #22 at STP what is the volume of 51.0 grams of NH 3  Convert to moles: 51/17 = 3 moles  3 moles x 22.4 = 67.2 (A)

18. You will NOT be able to use… Mole Road! Mole Road! Pink Gram to Gram Conversion Pink Gram to Gram Conversion Here’s a Trick… Here’s a Trick…  Be able to draw them out yourself so when you get your test you can draw them on the test and use them that way!