3. Complete these sequential reactions, including phases: Na2O(s) + H2O(l) → Na2CO3(s) H₂O Na2CO3(s) H₂O + Ba(OH)2(aq) → + Ba(OH)2(aq) → + 2HCl(aq) → 4. In the Ba(OH)2 tests shown in the previous problem, what difference would you expect to observe? Why would it be a problem if you don't dissolve the decomposition product completely before adding barium hydroxide? 5. Sample calculation: If you perform a similar experiment decomposing Cu(OH)2 according to the following equation, starting with 6.831 g of Cu(OH)2, how much CuO should you get, in grams? Cu(OH)2(s) → CuO(s) + H2O(g)

Write a balanced equation for the reaction of hydroiodic acid, HI, with calcium hydroxide, Ca(OH)2. Then, write the balanced complete ionic equation and the net ionic equation for this neutralization reaction.

Write the balanced formula, complete ionic, and net ionic equations for each of the following acid-base reactions. a. HClO4(aq) + Mg(OH)2(s) b. HCN(aq) + NaOH(aq) c. HCl(aq) + NaOH(aq)

A student is asked to identify the metal nitrate present in an aqueous solution. The cation in the solution can be either Na+, Ba2+, Ag+, or Ni2+. Results of solubility experiments are as follows: unknown + chloride ions—no precipitate unknown + carbonate ions—precipitate unknown + sulfate ions—precipitate What is the cation in the solution?

87. What volume of 0.151 N NaOH is required to neutralize 24.2 mL of 0.125 N H2SO4? What volume of 0.151 N NaOH is required to neutralize 24.2 n1L of 0.125 M H2SO4?

A student mixes four reagents together, thinking that the solutions will neutralize each other. The solutions mixed together are 50.0 mL of 0.100M hydrochloric acid, 100.0 mL of 0.200 M of nitric acid, 500.0 mL of 0.0100 M calcium hydroxide, and 200.0 mL of 0.100 M rubidium hydroxide. Did the acids and bases exactly neutralize each other? If not, calculate the concentration of excess H+ or OH ions left in solution.

Chlorisondamine chloride (C14H20Cl6N2) is a drug used in the treatment of hypertension. A 1.28-g sample of a medication containing the drug was treated to destroy the organic material and to release all the chlorine as chloride ion. When the filtered solution containing chloride ion was treated with an excess of silver nitrate, 0.104 g silver chloride was recovered. Calculate the mass percent of chlorisondamine chloride in the medication, assuming the drug is the only source of chloride.

You are given mixtures containing the following compounds. Which compound in each pair could be separated by stirring the solid mixture with water? (a) NaOH and Ca(OH)2 (b) MgC12 and MgF2 (c) AgI and KI (d) NH4Cl and PbCl2

An unknown solid acid is either citric acid or tartaric acid. To determine which acid you have, you titrate a sample of the solid with aqueous NaOH and from this determine the molar mass of the unknown acid. The appropriate equations are as follows. Citric acid: H3C6H5O7(aq) + 3 NaOH(aq) 3 H2O(l) + Na3C6H5O7(aq) Tartaric acid: H2C4H4O6(aq)+ 2 NaOH(aq) 2 H2O(l) + Na2C4H4O6(aq) A 0.956-g sample requires 29.1 mL of 0.513 M NaOH to consume the acid completely. What is The unknown acid?

Two students titrate different samples of the same solution of HCl using 0.100 M NaOH solution and phenolphthalein indicator (Figure 4.12). The first student pipets 20.0 mL of the HCl solution into a flask, adds 20 mL of distilled water and a few drops of phenolphthalein solution, and titrates until a lasting pink color appears. The second student pipets 20.0 mL of the HCl solution into a flask, adds 60 mL of distilled water and a few drops of phenolphthalein solution, and titrates to the first lasting pink color. Each student correctly calculates the molarity of an HCl solution. What will the second students result be? (a) four times less than the first students result (b) four times greater than the first students result (c) two times less than the first students result (d) two times greater than the first students result (e) the same as the first students result