c. The [H+] of a solution changes from.000001 docreased? Has the H+ concentratio
ID: 186023 • Letter: C
Question
c. The [H+] of a solution changes from.000001 docreased? Has the H+ concentration increased or decreased? By what asc to ,000000001? Has the pH increased or ? By what factor? (3 pts) Answer Chemical bonds Q9. Distinguish between ionic, polar covalent, and nonpolar covalent bonds. (3pts) a. No electronegativity difference between two atoms leads to a(n) -bond. e.g. H-H (H has an electronegativity of 2.1) b. A small electronegativity difference leads to a(n) e.g. H-O (H has electronegativity of 2.1, O is 3.5.) + bond. partially partialy positive negative bond. c. A large electronegativity difference leads to a(n) e.g. Na CI (Na has electronegativity of 0.9, Cl is 3.0) Note: The electrons are actually moving around within a molecular orbital, but dots indicated their average distance from atoms A & B. Think of the electrons moving around the nucleus like the blades of a fan move around when the fan is on.Explanation / Answer
Question: The [H+] of a solution changes from .000001 to .000000001? Has the H+ concentration increased or decreased? Has the pH increased or decreased ? By what factor?
Answer:
The [H+] of the solution changes from .000001 to .000000001.
The change that occured from .000001, ie. 1x10-6 to .000000001, ie. 1x10-9 ,denotes a decrease in the [H+] of the solution.
pH increases as the concentrations of H+ ions decreases. Hence solutions with a low concentrations of H+ ions have a high pH.
The [H+] of the solution decreased from .000001, ie. 1x10-6 to .000000001, ie. 1x10-9, by a factor of 1000.
Question: Q9. Distinguish between ionic, polar covalent, and nonpolar covalent bonds.
Q9.a: No electronegativity difference between two atoms leads to a(n) _____ bond. e.g. H-H (H has an electronegativity of 2.1)
Answer: Non-polar bond
Nonpolar Covalent bond: Equal sharing (between the two atoms) of the electrons in the bond.
Q9.b: A small electronegativity difference leads to a(n) ____ bond. e.g. H-O (H has electronegativity of 2.1, O is 3.5.)
Answer: b. Polar bond
Polar Covalent: Unequal sharing (between the two atoms) of the electrons in the bond.
Q9.c: A large electronegativity difference leads to a(n)____ bond. e.g. Na CI (Na has electronegativity of 0.9, Cl is 3.0)
Answer: c. Ionic bond
Ionic bond: Complete transfer (between the two atoms) of the electrons in the bond.
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