Benzene C_6H_6. has the structure shown above. Considering che observation that

Question

Benzene C_6H_6. has the structure shown above. Considering che observation that benzene is only sparingly soluble in water, which of the following best describes the intermolecular forces of attraction between water and benzene? (A) Benzene is nonpopular, therefore there are no forces between water and benzene. (B) The H atoms in benzene form hydrogen bonds with the O atoms in water. (c) Benzene is hydrophobic, therefore there is net repulsion between water and benzene. (D) There are dipole induced dipole and London dispersion interactions between water and benzene. 22. Acid-dissociation constants of two acids are listed in the table above. A 20, mL sample of a 0.10 M solution of each acid is titrated to the equivalent point with 20, mL of 0.10 M NaOH. which of the following is a true statement about the pH of the solutions at the equivalence point? (A) Solution 1 has a higher pH at the equivalence point because CH_3CO_2H is the stronger acid. (B) Solution 1 has a higher pH at the equivalence point beacause CH_3CO_2H has the stronger conjugate base.

Explanation / Answer

21. For benzene and water with low solubility we can say,

(A) benene is non-polar, therefore there are no forces between water and benzene

22. For the given two acids and titration with NaOH, at equivalence point

(A) Solution I has higher pH at the equivalence point basuce CF3COOH is the stronger acid.

23. Based on the calorimeter data and comparign the energy q = mCpdt for the two we get,

(C) The combustion of 1 g of cashew releases (calculated energy = 20.900 kJ/g) more energy than the combustion of 1 g of marshmallow (calculated energy = 13.933 kJ/g).

Related Questions

Navigate

• Browse (All)
• Browse B
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.