Ch.4 - Chemical Quantities & Aqueous Reactions

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Tro 4th Edition

Ch.4 - Chemical Quantities & Aqueous Reactions

Problem 53a,b

Calculate the molarity of each solution.

a. 3.25 mol of LiCl in 2.78 L solution

b. 28.33 g C₆H₁₂O₆ in 1.28 L of solution

Problem 53c

Calculate the molarity of each solution.

c. 32.4 mg NaCl in 122.4 mL of solution

Problem 54

Calculate the molarity of each solution. a. 0.38 mol of LiNO₃ in 6.14 L of solution b. 72.8 g C₂H₆O in 2.34 L of solution c. 12.87 mg KI in 112.4 mL of solution

Problem 55

What is the molarity of NO₃^– in each solution? a. 0.150 M KNO₃ b. 0.150 M Ca(NO₃)₂ c. 0.150 M Al(NO₃)₃

Problem 56a

what is the molarity of Cl^- in each solution? a. 0.200 M NaCl

Problem 56b

What is the molarity of Cl^- in each solution? b. 0.150 M SrCl₂

Problem 56c

what is the molarity of Cl^- in each solution? c. 0.100 M AlCl₃

Problem 57a

How many moles of KCl are contained in each solution? a. 0.556 L of a 2.3 M KCl solution

Problem 58a

What volume of 0.200 M ethanol solution contains each amount in moles of ethanol? a. 0.45 mol ethanol

Problem 58c

What volume of 0.200 M ethanol solution contains each amount in moles of ethanol? c. 1.2⨉10^-2 mol ethanol

Problem 59

A laboratory procedure calls for making 400.0 mL of a 1.1 M NaNO₃ solution. What mass of NaNO₃ (in g) is needed?

Problem 60

A chemist wants to make 5.5 L of a 0.300 M CaCl₂ solution. What mass of CaCl₂ (in g) should the chemist use?

Problem 61

If 123 mL of a 1.1 M glucose solution is diluted to 500.0 mL, what is the molarity of the diluted solution?

Problem 62

If 3.5 L of a 4.8 M SrCl₂solution is diluted to 45 L, what is the molarity of the diluted solution?

Problem 63

To what volume should you dilute 50.0 mL of a 12 M stock HNO₃ solution to obtain a 0.100 M HNO₃ solution?

Problem 65

Consider the precipitation reaction: 2 Na3PO4(aq) + 3 CuCl2(aq) → Cu3(PO4)2(s) + 6 NaCl(aq). What volume of 0.175 M Na3PO4 solution is necessary to completely react with 95.4 mL of 0.102 M CuCl2?

Problem 68

What is the molarity of ZnCl₂ that forms when 25.0 g of zinc completely reacts with CuCl₂ according to the following reaction? Assume a final volume of 275 mL. Zn(s) + CuCl₂(aq) → ZnCl₂(aq) + Cu(s)

Problem 69

A 25.0-mL sample of a 1.20 M potassium chloride solution is mixed with 15.0 mL of a 0.900 M lead(II) nitrate solution and this precipitation reaction occurs: 2 KCl(aq) + Pb(NO3)2(aq) → PbCl2(s) + 2 KNO3(aq). The solid PbCl2 is collected, dried, and found to have a mass of 2.45 g. Determine the limiting reactant and the theoretical yield.

Problem 69c

A 25.0-mL sample of a 1.20 M potassium chloride solution is mixed with 15.0 mL of a 0.900 M lead(II) nitrate solution and this precipitation reaction occurs: 2 KCl(aq) + Pb(NO₃)₂(aq) → PbCl₂(s) + 2 KNO₃(aq) The solid PbCl₂ is collected, dried, and found to have a mass of 2.45 g. Determine the the percent yield.

Problem 70

A 55.0-mL sample of a 0.102 M potassium sulfate solution is mixed with 35.0 mL of a 0.114 M lead(II) acetate solution and this precipitation reaction occurs: K₂SO₄(aq) + Pb(C₂H₃O₂)₂(aq) → 2 KC₂H₃O₂(aq) + PbSO₄(s) The solid PbSO₄ is collected, dried, and found to have a mass of 1.01 g. Determine the limiting reactant, theoretical yield, percent yield.

Problem 71

For each compound (all water soluble), would you expect the resulting aqueous solution to conduct electrical current? a. CsCl b. CH₃OH c. Ca(NO₂)₂ d. C₆H₁₂O₆

Problem 72

Classify each compound as a strong electrolyte or nonelectrolyte. a. MgBr₂ b. C₁₂H₂₂O₁₁ c. Na₂CO₃d. KOH

Problem 73

Determine whether each compound is soluble or insoluble. If the compound is soluble, list the ions present in solution. a. AgNO₃ b. Pb(C₂H₃O₂)₂ c. KNO₃ d. (NH₄)₂S

Problem 74

Determine whether each compound is soluble or insoluble. If the compound is soluble, list the ions present in solution. a. AgI b. Cu₃(PO₄)₂ c. CoCO₃ d. K₃PO₄

Problem 75

Complete and balance the following equation. If no reaction occurs, write “NO REACTION.” NaOH(aq) + FeCl3(aq) → ?

Problem 75a

Complete and balance each equation. If no reaction occurs, write 'NO REACTION.' a. LiI(aq) + BaS(aq)

Problem 75b

Complete and balance each equation. If no reaction occurs, write 'NO REACTION.' b. KCl(aq) + CaS(aq) →

Problem 75c

Complete and balance each equation. If no reaction occurs, write 'NO REACTION.' c. CrBr₂(aq) + Na₂CO₃(aq) →

Problem 76

Complete and balance each equation. If no reaction occurs, write “NO REACTION.” b. NaCl(aq) + Hg2(C2H3O2)2(aq) → c. (NH4)2SO4(aq) + SrCl2(aq) →

Problem 76a

Complete and balance each equation. If no reaction occurs, write 'NO REACTION.' a. NaNO₃(aq) + KCl(aq) →