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Chapter 4: Q4.43P (page 180)
(a) Name three common strong acids.
(b) Name three common strong bases.
(c) What is a characteristic behavior of a strong acid or a strong base?
(a)
(b)
(c)Strong acid or strong base both can completely dissociate in water.
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Balance each of the following redox reactions and classify it as a combination, decomposition, or displacement reaction:
The precipitation reaction between 25.0 mL of a solution containing a cation (purple) and 35.0 mL of a solution containing an anion (green) is depicted below (with ions shown as spheres and solvent molecules omitted for clarity).
(a) Given the following choices of reactants, write balanced total ionic and net ionic equations that best represent the reaction:
(1) KNO3(aq) + CuCl2(aq)
(2) NaClO4(aq) + CaCl2(aq)
(3) Li2SO4(aq) + AgNO3(aq)
(4) NH4Br(aq) + Pb (CH3COO)2(aq)
(b) If each sphere represents 2.5 x 10-3 mol of ion, find the total number of ions present.
(c) What is the mass of solid formed?
On a lab exam, you have to find the concentrations of the monoprotic (one proton per molecule) acids HA and HB. You are given 43.5mL of HA solution in one flask. A second flask contains 37.2mL of HA, and you add enough HB solution to it to reach a final volume of 50.0mL. You titrate the first HA solution with 87.3mL of 0.0906M NaOH and the mixture of HA and HB in the second flask with 96.4mL of the NaOH solution. Calculate the molarity of the HA and HB solutions.
A reaction cyclefor an element is a series of reactions beginning and ending with that element. In the following copper reaction cycle, copper has either a 0 or a _2 oxidation state. Write balanced molecular and net ionic equations for each step in the cycle.
(1) Copper metal reacts with aqueous bromine to produce a green-blue solution.
(2) Adding aqueous sodium hydroxide forms a blue precipitate.
(3) The precipitate is heated and turns black (water is released).
(4) The black solid dissolves in nitric acid to give a blue solution.
(5) Adding aqueous sodium phosphate forms a green precipitate.
(6) The precipitate forms a blue solution in sulfuric acid.
(7) Copper metal is recovered from the blue solution when zinc metal is added.
Describe how to determine the oxidation number of sulfur in
(a) and (b)
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