What is a compound? In ionic compounds electrons are __________ In covalent compounds electrons are _______________ Why are ionic compounds brittle? Which will conduct electricity when dissolved, ionic or molecular compounds? Why do ionic compounds have high melting and boiling points? Why is a bond polar? Draw the Lewis diagram for At2 Draw the Lewis diagram for CCl2H2 Draw the Lewis diagram for SO3-2 Draw the Lewis diagram for the azide (N3-) ion Draw the Lewis diagram for COH2 Draw all of the resonance structures for CSO Give the AB geometry and shape for CO2 Give the geometry and shape for CCl4 Which molecules are polar? CO2 COS CS2 CH3Cl Draw a picture showing how potassium fluoride dissolves in water. draw a picture showing how carbon tetrachloride dissolves in hexane Which compound(s) would likely dissolve in water? 1. CH2O 2. CF4 3. Cl2 4. Cl2O 5. CaCl2 Which compound would likely dissolve in hexane? 1. CH2O 2. CF4 3. Cl2 4. Cl2O 5. CaCl2 Give the principle by which covalent compounds dissolve A compound dissolves in hexane but not in water. Which could it be? MgI2 HI I2 Which compound(s) will have hydrogen bonding CO2 CF4 CHF3 HF CH3OH Which compound(s) will have dipole-dipole intermolecular attractions CO2 CF4 CHF3 H2S Which compound(s) will have dispersion intermolecular attractions CO2 CF4 CHF3 H2S Rate the following in orders of increasing intermolecular attractions CO2 CF4 CHF3 HF Rate the following in terms of boiling point PF3 P2 H2O A compound was found to conduct electricity in solution, dissolve in water and is brittle it could be which of the following MgBr2 CBr4 Cu N2O A compound was found to dissolve in hexane but not water, it can melt in a bunsen burner flame and is soft. It could be CaBr2 CCI4 Ni NiCl3 NO Explain how a metal conducts electricity. Why are some molecular compounds brittle while others are soft? Give the complete equation for the reaction of magnesium metal with nitric acid Write the complete equation for the Decomposition of magnesium chlorate Give net ionic equation for the following reactions 1. Copper metal is added to lithium nitrate 2. A solution of calcium hydroxide is added to phosphoric acid 3. A solution of sodium phosphate is added to a solution of iron(II) chloride reaction of strontium oxide with water reaction of a solution of ammonium chlorate and a solution of calcium chloride Assign oxidation numbers for the following: 1. 2. 3. 4. SO2 NH3 CO2 SO4-2 Are the following oxidation reduction reactions? Which substance is oxidized and which is reduced? a. C + H2SO4 CO2 + SO2 + H2O b. HNO3 + HI NO + I2 + H2O c. KMnO4 + HCl MnCl2 + Cl2 + H2O + KCl = Calculate the mass of potassium chloride produced when 38.0 grams of potassium chlorate decompose according to the reaction below. KClO3 KCl + O2 How many grams of carbon dioxide are produced from the combustion of 250. g of ethane, C3H8, in the reaction C3H8+ O2 3CO2 + 4H2O For the reaction Pb(NO3)2 + KI PbI2 + KNO3, What is the percent yield if 2.5 grams of lead nitrate produced 2.0 grams of lead (II) iodide. If cyclohexanol is burned as a fuel in the following reaction, how many moles of carbon dioxide will be produced from 45.0 grams of cyclohexanol and 2.0 grams of oxygen gas? C6H12O + O2 CO2 + H2O