Lab 7 REPORT FORM_ CHEKERDJIAN

Can you please help me answer this

11. Hydrogen chloride is a compound. a. Draw a diagram to show how the electrons are arranged in a molecule of hydrogen chloride. Show only the outer electrons. Show hydrogen electrons as (circles) Show chlorine electrons as (x) b. State the name of the type of bonding present in hydrogen chloride._ c. Hydrogen chloride dissolves in water to form an acidic solution (hydrochloric acid). Describe how you would use litmus paper to show that this solution is acidic. d. Which one of the following values is most likely to represent the pH of a dilute solution of hydrochloric acid? Circle the correct answer pH2 pH7 pH10 f. Name the salt formed in this reaction. pH14 e. Complete the following equation for the reaction of hydrochloric acid with magnesium. Mg(s) + HCl(aq) → MgCl₂(aq) + H₂(g)

In a post-lab question, a student was asked to explain heat curves. This is what they wrote:   "A heating curve shows how the temperature of a molecule changes as it is heated. First, it starts as a solid below its melting point. Then, as heat is put in, the bonds start to break at the phase change, and the molecule becomes a liquid. The temperature of the molecule cools slightly at this point. Then, the temperature rises again because the heat going in makes the molecules have greater potential energy (motion). At its boiling point, more bonds break and it turns into a gas. The phase changes are the flat regions of the heating curves because all the heat going in is used to break the bonds."   While they have a lot right, there are a number of mistakes. Highlight or copy-and-paste 2 errors, and explain what is wrong/how to fix the errors.

Please answer the following questions in your own words.   Define the following terms:   Ion –    Valence electrons –   Atomic number –   Electronegativity –   Octet rule –   Explain the difference between a covalent, ionic, and hydrogen bond.     Compare and contrast polar and nonpolar covalent bonding. Identify 1 similarity and 1 difference.     Answer the following questions about water (H20):   Which type of chemical bond holds the hydrogen and oxygen atoms together in a single water molecule?   Which type of chemical bond holds different water molecules together in a water droplet?   Is water an example of a polar or nonpolar molecule? Explain.   Which atom in a water molecule has a greater electronegativity?   Will water dissolve nonpolar molecules? Explain.     Explain how the following properties of water are important to living organisms:   Water has a high heat of vaporization   Water is a good solvent   Ice is less dense than liquid water

11. Complete the chart. **You should not have the same answer for all the IMF in the last column** Polarity of Molecular Formula Lewis Structure(1) Polarity of Molecule Justify your answer. What type of Intermolecular Forces exist in the molecule. Justify your Bond. Justify your answer. answer. 02 N2 H2O Between the H and the O NH3 Between the H and the N

Explain, in molecular terms, why oil and water do not mix.

Boron nitride is the second hardest substance known (next to diamond). It has a very high melting point but does not conduct electricity. What type(s) of bonding do you think is present in boron nitride? 1. There is covalent bonding within boron nitride molecules (BN), and London dispersion forces between the molecules. 2. There is a three dimensional network of metallic bonds between boron and nitrogen atoms. 3. There are covalent bonds between boron and nitrogen atoms which exist in a 3D network. 4. It is not possible to predict the type of bonding from a consideration of bulk properties. 5. There is covalent bonding within two-dimensional layers of alternating boron and nitrogen molecules, with London dispersion forces between the layers. O 5 O 3 0 1 02 04

1. Draw the Lewis structure of a molecule of iodine. Is it polar or nonpolar? What intermolecular forces does it have? Draw the Lewis structure of n- decane (look in textbook). Is it polar or nonpolar? What intermolecular forces does it have? Draw the Lewis structure of isopropyl alcohol (page 665 or search on-line). Is it polar or nonpolar? What intermolecular forces does it have? 3. 2.

compound hydrogen-bonding force Between Between molecules of formula or Lewis molecules of the the compound and molecules of water? name structure compound? H H | Н — С | | yes yes N-chloromethylamine - no no H. yes yes hydrogen iodide HI no no :0: || н —с —с-о — н H yes yes acetic acid no no H O O

Look very closely at those images. Look at those lines and look at those electrons. Use the image attached to help.

CONCEPT MAPPING Marvin started a concept map to demonstrate the properties of water. He lost the map on campus, but luckily you found it. Save the day and complete his map. You'll notice that in the bottom left the document says "paste drawing here." As part of this task, you will be creating a drawing of a molecule of water. Be sure to label the molecule with the types of atoms and the charges that make this molecule polar. ?????

This subject is physical science. Please answer the following questions.The second picture is the result Hope you can answer ,thankyou!

Look at the structure of a soap molecule, and explain what happened when you added soap to your oily hands and put your hands under the water for the solubility lab. Why could you wash the oil off your hands with soap and water? You should use chemistry concepts including structure, polarity, and intermolecular forces to explain your answer. attached is the lewis structure of a basic soap molecule. There are covalent bonds between all carbons, hydrogens, and oxygens. However, there is an ionic bond between oxygen and sodium ions.

Draw the electron distribution diagram for water. Begin with 1 central water molecule. Show the chemistry of each element within the central water molecule (all electron orbits, lone pair electrons, type of chemical bond, polarity/charge, and correct shape). What type of bond creates a water molecule? What type of bond holds 1 water molecule to another water molecule? Next, draw the correct number of other water molecules bonding to the central water molecule. How many other water molecules bond to a central molecule of water?

Refer to the figure below. Which of the following is TRUE about the polarity of the 7. two compounds? C Vies eac H. B. NH, BH3 A. NH3 and BH, are both nonpolar. B. NH, is nonpolar and BH3 is polar. C. NH3 is polar and BH, is nonpolar. D. NH3 and BH, are both polar molecules. 8. Why does sugar dissolve in water but not in gasoline? A. Gasoline is a nonpolar molecule. B. Sugar C. Water interacts with the polar areas of sucrose which makes sucrose dissolve in water. D. All of the above statements explain why sugar dissolves in water but not in gasoline. water are both polar molecules. 9. What is the polarity of CO, molecules? Why? A. It is polar, because its charges are distributed symmetrically and its molecular geometry is symmetrical. B. It is polar, because its charges are distributed asymmetrically and its molecular geometry is asymmetrical. C. It is nonpolar, because its charges are distributed symmetrically and its molecular geometry is symmetrical. D. It is nonpolar, because its…

TRUE if the postulate is accurate and FALSE if the postulate is flawed.                                Postulates 3.Collisions between molecules are perfectly elastic (that is, no energy is gained nor lost during the                    collision).  4.There are negligible, attractive, or repulsive forces between molecules.  5.The average kinetic energy of a molecule is constant.

Match each item with the correct statement ¡¡¡· · · · What are bonds between molecules called? What is a property of polar molecules? What is a property of nonpolar molecules? What is the collective name for intermolecular bonding? What is the only force of attraction between noble gases? What dipole-dipole force between H and N, O, or F? results either What makes water a highly polar molecule? What force is responsible for holding polar molecules to one another? 1. 2. 3. intermolecular 4. 5. 6. 7. London dispersion polar covalent bonds and symmetrical structure hydrophobic 9. van der Waals forces hydrogen bond polar covalent bonds and asymmetrical structure 8. intramolecular hydrophilic 10. dipole-dipole

a) What types of elements are bonded together to make an ionic compound? Give three examples of ionic compounds. Identify the types of elements that make up the compound in each example.    B) Describe how the physical state of a substance at room temperature depends on the strength of the intermolecular forces between the particles of the substance.

Have each member of your group select one of the molecules shown below and complete steps a–d. Each member should then present his or her results to the rest of the group, explaining the reasoning used to determine the answers. CS2 NCl3 CF4 CH2F2a. Draw the Lewis dot structure.b. Determine the molecular geometry and draw it accurately.c. Indicate the polarity of any polar bonds within the structure.d. Classify the molecule as polar or nonpolar.

Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. substance A B C D chemical symbol, chemical formula or Lewis structure H-C=C-H H — He Fe -C=N: X boiling point (Choose one) (Choose one) O (Choose one) ŵ (Choose one) S

Consider a molecule I2CO, what would be the molecular geometry? Would you predict the molecule is polar or nonpolar?

Complete the following table with needed information. Draw the 7 Lewis structures (structural formula). All bonded pairs must be shown with solid lines and all lone pairs with dots. Answer the questions after drawing your structure. If the molecule is polar, show the net dipole with appropriate arrow. See active Fig 9.30 in your book. Water is shown as an example here. Please do not show any calculations here, just the required information. Must show all lone pairs. H₂O CS₂ Ö Electron pair geometry: Tetrahedral Molecular Geometry: Bent Approximate bond angle: 109° Polar or nonpolar: Polar SiH₂O (hint: central atom is Si) Electron pair geometry: Molecular Geometry: Approximate bond angle: Polar or nonpolar: H₂Se Electron pair geometry: Molecular Geometry: Approximate bond angle: Polar or nonpolar: Electron pair geometry: Molecular Geometry: Approximate bond angle: Polar or nonpolar: NO3 Electron pair geometry: Molecular Geometry: Approximate bond angle: Polar or nonpolar: PF3 Electron…