Question

1.     The expression “like dissolves like” is often used in chemistry. Use any two examples to explain what this means.

2.     What are the values of the following?

a.     Standard pressure in kiloPascals

b.     Molar volume of a gas at STP

c.     Standard temperature in Kelvins

d.     Standard pressure in millimeters of mercury

3.     Identify the acid, base, conjugate acid, and conjugate base (as applicable) in each of these reactions. Then indicate the acid-base theory that applies in each case.

a.     N₂H₄ + H₃O⁺ → N₂H₅⁺ + H₂O

b.     3HCl + Al(OH)₃ → AlCl₃ + 3H₂O

c.     H₂O + H₂O → OH^- + H₃O⁺

d.     AlCl₃ + Cl^- → AlCl₄^-

e.     H₂O + CH₃COO^- → CH₃COOH + OH^-

f.      H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O

g.     H⁺ + OH^- → H₂O

NOTE: You do not have to rewrite each formula or equation in problem 3. Use the alphabet to reference each participant.

For example:      In 3a, N₂H₄ is A, H₃O⁺ is B, N₂H₅⁺ is C, and H₂O is D.

In 3d, AlCl₃ is A, Cl^- is B, and AlCl₄^- is C.

Answer 1