The activity coefficient (y) of a neutral molecule is typically approximated as 1.00; however, a more acc be made by using the equation, log (y) = ku where k≈ 0.2 for organic molecules and is the ionic strength. Using the activity coefficients for H¹, the value of the given concentration quotient for acetic acid (HA = CH₂ CO₂H). You will need to look L coefficients for H and A in a table. concentration quotient [H][A] [HA] [H+][A] at μ = 0 M at μ = 0.1 M

Among the solubility rules previously discussed is the statement: Carbonates, phosphates, borates, andarsenates—except those of the ammonium ion and the alkali metals—are insoluble. (a) Write the expression for the equilibrium constant for the reaction represented by the equationCaCO_3(s) ⇌ Ca^2+(aq) + CO3^1−(aq). Is Kc > 1, < 1, or ≈ 1? Explain your answer. (b) Write the expression for the equilibrium constant for the reaction represented by the equation3Ba^2+(aq) + 2PO_4^3−(aq) ⇌ Ba_3(PO_4)_2(s). Is Kc > 1, < 1, or ≈ 1? Explain your answer.

Consider an aqueous solution of pyridine, C5NH5(aq), with F = 5.0 mM, at 1 bar and at 298 K. Pyridine is a weak Brønsted-Lowry base. Structure of pyridine,  List all the species in solution. If you like, you can abbreviate pyridine as “pyr”.

What is the activity coefficient for each ion at the given ionic strength at 25 °C? Activity coefficients at various ionic strengths can be found in this table. so (u= 0.1 M) y = Y³+ (μ = 0.01 M) y = I Pr³+ (μ = 0.1 M) Y = x10 0.36 TOOLS (CH₂CH₂)₂NH+ (μ = 0.05 M) y = 0.8