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If the K of a weak base is 8.7 x10, what is the pH of a 0.35 M solution of this base? Number pH= 11.75
If a buffer solution is 0.520 M in a weak acid (Ka-5.4 x10 and 0.220 M in its conjugate base, what is the pH? Number
If a buffer solution is 0.520 M in a weak acid (Ka-5.4 x10 and 0.220 M in its conjugate base, what is the pH? Number
If the Kb of a weak base is 5.4 × 10-6, what is the pH of a 0.25
M solution of this base?
If the Kb of a weak base is 5.4 x 106, what is the pH of a 0.25 M solution of this base? Number
1. If a buffer solution is 0.150 M in a weak base (K,.710 what is the pH? and 0.430 M in its conjugate acid Number 2. If a buffer solution is 0.250 M in a weak acid (K what is the pH? 5.1 x10) and 0.550 M in its conjugate base, Number pH-
If the K, of a weak base is 7.4 x 10, what is the pH of a 0.42 M solution of this base? pH
A certain weak base has a K of 7.50x107. What concentration of this base will produce a pH of 10.23? Number 00017 NH3 is a weak base (Kb = 1.8 x 10-5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.069 M in NH4Cl at 25 °C? Number pH-
If the K, of a weak base is 7.8 x 10-3, what is the pH of a 0.50 M solution of this base?
For the diprotic weak acid H2A, Ka-3.6x10 and Ka2 8.6 x10 What is the pH of a 0.0700 M solution of H2A? What are the equilibrium concentrations of H2A and A in this solution? Number pH- Number H,A Number
Strong base is dissolved in 755 mL of 0.200 M weak acid (K = 4.16 x10^-5) to make a buffer with a pH of 3.96. Assume that the volume remains constant when the base ?s added. Calculate the pKa value of the acid and determine the number of moles of acid initially present When the reaction is complete, what is the concentration ratio of conjugate base to acid? How many moles of strong base were initially added?
Answer
Strong base is dissolved in 715 ml of 0.400 M weak acid (K. 4.73 x10) to make a buffer with a pH of 4.05. Assume that the volume remains constant when the base is added. HA(aq) + OH-(aq) 11,011) +A-(aq) -> Calculate the pka value of the acid and determine the number of moles of acid initially present. Number Number рк,-14.325 0.286mol HA When the reaction is complete, what is the concentration ratio of conjugate base to acid? Number...