Question

Second Week: A closer look at molecular geometries and polarity. This part of the laboratory will make use of the PhET simulation for molecule polarity. On the phet.colorado.edu website, select "Play with Simulations." Now, choose "Chemistry" in the left options of simulations, and then select the "Molecule Polarity" simulation. Choose the "Three Atoms" simulation. When the simulation loads, in the "view" menu, choose to display the bond dipoles, molecular dipoles, and partial charges. Questions Water, H2O 1. Draw the Lewis dot structure for water below. Label the hydrogen and oxygen atoms to match the letter labels from the simulation (A, B, and C). 2. What molecular geometry does water have? 3. Which atom is more electronegative, hydrogen or oxygen (answer below)? Set the atom electronegativities of atom A, B, and Caccordingly. 4. Are there bond dipoles in water? Towards which atom, oxygen or hydrogen, do the bond dipoles point (if present)? 5. Is there an overall molecule dipole in water? Towards which end of the molecule is the overall molecule dipole pointed? 6. Bond dipoles and molecule dipoles point toward the more/less electronegative atom(s)? (choose best answer). 7. What do you notice about the partial charges on the atoms in water? Carbon Dioxide, CO2 8. Draw the Lewis dot structure for carbon dioxide below. Label the hydrogen and oxygen atoms to match the letter labels from the simulation (A, B, and C). 9. What molecular geometry does carbon dioxide have?

Answer 1

20:6 2. molecular geometry is tetrahydral & bent shape 3. Oxygen is more electronegative. · Eleetronegativity B> A=C. yes, bond dipoles points towords oxygen atom - yes. A from oxygen gon to away from molecule 4. 19 O: 0 0 0 6. Bond dipoles and Molecular dipoles points towards mose eleckconegative atome. Partial positive charge on Hydrogen atoms while partial negative charge on Oxygen atom. 7. 0 3. = = 0 с А в molecullar zeometry is linear