Module 6

Question 1

K_eq =

Answer 1

[C]^c[D]^d/[A]^a[B]^b

Question 2

(Delta)Gº =

Answer 2

-R • T • ln(K)

R = ideal gas constant

T = Temperature

ln = natural logarithm

K = equilibrium constant

Question 3

K =

Answer 3

e ^{-(Delta)Gº / RT}

Question 4

When taking the logarithm of a value that has error in it,

Answer 4

the number of significant figures in the value determines how many significant figures you report to the right of the decimal in your answer.

Question 5

Common Ion Effect

Answer 5

Reduction in a solute’s solubility when put in th epresence of a common ion

Question 6

Most ionic solids made with group 1A metals

Answer 6

are soluble

Question 7

All ionic solids made with the ammonium ion

Answer 7

are soluble

Question 8

Most nitrates and acetates

Answer 8

are soluble

(Exceptions: AgC₂H₃O₂, HgC₂H₃O₂, Cr(C2H3O2)₃ )

Question 9

Most chlorides

Answer 9

are soluble

(Exceptions: HgCl, AgCl, Pb, SO₄

Question 10

Most sulfates

Answer 10

are soluble

(Exceptions: SrSO₄, BaSO4, CaSO4 and PbSO4)

Question 11

Most Hydroxides (except those made with Group 1A metals and the ammonium ion)

Answer 11

are mostly insoluble

Question 12

Most carbonates, phosphates, and sulfides (except those made with Group 1A metals and the ammonium ion)`

Answer 12

are mostly insoluble

Question 13

Until a solution is saturated,

Answer 13

the product of the ion concentrations is less than K_sp.

Question 14

When raising a number to a power that has error in it,

Answer 14

the significant figures are ditermined solely by the number of significant figures to the right of the decimal. The number of significant figures left of the decimal point is not relevant.