Chapter 15
the ratio of concentrations raised to appropriate powers will always equal the same value, K is known as?
what is: law of mass action
What is the conjugate base pair of HNO2?
what is NO2-
A solution containing both a weak acid and its conjugate base is called a
what is: a buffer solution
The first modern definition of acids and bases, the Arrhenius theory is based directly on?
what is: H+ & OH- ions.
____ states that if a stress is applied to a system at equilibrium, reaction will shift in a way to relieve stress.
what is: Le Châtelier’s principle
What is the pH of 100 mL of 0.10 M HCl after adding 50 ml of 020 M NaOH?
what is: 7.0
a solution containing both a _____ acid & a conjugate base is called a ____ solution.
what is: weak & buffer
Ksp is a measure of a compound's?
what is: solubility
Calculate the equilibrium concentrations of all species when 0.100 M benzoic acid, HC7H5O2, dissolves in water, Kc= 6.31 X 10^-5.
what is: 2.51%
Calculate the pH of a 0.41M NaCN solution. [Ka(HCN) = 4.9 × 10–10]
what is 11.96
Calculate the pH of buffer containing concentration of [NH3]=0.21 M and [NH4+]=0.14 M. The Kb of NH3 is 1.8 × 10–5.
what is: 9.43
what is the conjugate acid pair of PO4^3-?
what is: HPO4^2-
Kc=377 at 22°C of BrCl. Calculate 𝑄c for this reaction when the reaction mixture contains 0.32 M Br2, 0.37 M Cl2, and 0.15 M. 2 BrCl(g) ⇌ Br2(g) + Cl2(g).
what is: 5.3
calculate [OH-] if [H3O+]=9.3X10^-10M.
what is: 1.10X10^-5M.
in an acid buffer (pH=6.7), the ratio of concentrations of acid to salt is 3:2. the dissociation constant of the weak acid is
what is: 1.3X10^-7
find the pH of a 5.2X10-4M HNO3 solution?
what is 3.3
What is the equilibrium constant, Kc, 2BrCl3(g) Br2(g) + 3Cl2(g) found to contain 1.0 mol BrCl3, 2.0 mol Br2, and 6.0 mol Cl2 in a 6.0– L vessel?
what is: 11.42
determine pH of 0.255M solution of sodium acetate. Ka=1.8X10^-5 for acetic acid.
what is: 9.1
calculate molar solubility of AgCl in a solution of 0.348 M NaCl. Keq of AgCl is 1.77X10^-10.
what is: 5.09X10^-10
Calculate the pH of a 0.025 M NaCN solution. Ka for HCN = 1.5 x 10^-5
what is: 8.62