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Student Solutions Manual to accompany Principles of General Chemistry-Solutions Manual

531 SOLVED PROBLEMS

Question: 18.47

Write a balanced chemical equation and equilibrium expression for the dissociation of chloroacetic acid and convert pKa to Ka. ...

Verified Answer:

K_\text{a} = 10^{-\text{p}K} = 10^{-2.87} =...
Question: 18.p.10

a) The ions are K^+ and ClO2^-; the K^+ is from the strong base KOH, and does not react with water. The ClO2^- is from the weak acid HClO2, so it reacts with water to produce OH^- ions. ...

Verified Answer:

a) Since the base is strong and the acid is weak, ...
Question: 18.34

Write total ionic equations and then remove the spectator ions to write the net ionic equations. The (aq) subscript denotes that each species is soluble and dissociates in water. ...

Verified Answer:

\text{a) }\sout{\text{Na}}^+(\sout{aq})+\te...
Question: 18.p.9

The hypochlorite ion, ClO^-, acts as a weak base in water. Write a balanced equation and equilibrium expression for this reaction. The Kb of ClO^- is calculated from the Ka of its conjugate acid, hypochlorous acid, HClO (from Appendix C, Ka = 2.9 x 10^-8). Make simplifying assumptions (if valid), ...

Verified Answer:

\begin{matrix} & \text{ClO}^-(aq)+ &...
Question: 18.p.8

Pyridine contains a nitrogen atom that accepts H^+ from water to form OH^- ions in aqueous solution. Write a balanced equation and equilibrium expression for the reaction, convert pKb to Kb, make simplifying assumptions (if valid) and solve for [OH^-]. Calculate [H3O^+] using [H3O^+] [OH^-] = 1.0 x ...

Verified Answer:

\text{C}_5\text{H}_5\text{N}(aq) + \text{H}...
Question: 18.p.7

Write a balanced equation for the dissociation of HOCN in water. Using the given information, construct a table that describes the initial and equilibrium concentrations. Construct an equilibrium expression and solve the quadratic expression for x, the concentration of H3O^+. ...

Verified Answer:

\begin{matrix} & \text{HOCN}(aq)+ &...
Question: 18.p.6

Write a balanced equation for the dissociation of NH4^+ in water. Using the given information, construct a table that describes the initial and equilibrium concentrations. Construct an equilibrium expression and make assumptions where possible to simplify the calculations. ...

Verified Answer:

\begin{matrix} & \text{NH}_4^+(aq)+ &am...
Question: 17.69

The equilibrium constant for the reaction is Kp = PCO2 = 0.220 atm The amount of calcium carbonate solid in the container at the first equilibrium equals the original amount, 0.100 mol, minus the amount reacted to form 0.220 atm of carbon dioxide. The moles of CaCO3 reacted is equal to the number ...

Verified Answer:

\text{Moles CaCO}_3 = \text{moles CO}_2 = \...
Question: 17.68

a) You are given a value of Kc but the amounts of reactant and product is given in units of pressure. Convert Kc to Kp. ...

Verified Answer:

a) K_\text{p} = K_\text{c}(\text{RT})^{Δn} ...
Question: 17.65

a) You are given a value of Kc but the amounts of reactant and product is given in units of pressure. Convert Kc to Kp. ...

Verified Answer:

K_\text{p} = K_\text{c}(\text{RT})^{Δn} \qu...
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