Chapter 4: 11, 15, 18, 20, 22, 24, 30, 33, 36, 40, 42, 43, 46, 48, 50, 56, 60, 62, 64, 75, 82, 94 + C 2 H 3 O 2

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1 Chapter : 11, 15, 18, 0,,, 0,, 6, 0,,, 6, 8, 50, 56, 60, 6, 6, 5, 8, a. NaBr Na Br b. MgCl Mg Cl c. Al(NO ) Al NO d. (NH ) SO NH SO e. NaOH Na OH f. FeSO Fe SO g. KMnO K MnO h. HClO H ClO i. NH C H O NH C H O 1 mole NaHCO 5.6 g NaHCO g NaHCO 15. a. 0.6 M NaHCO b. 1g K CrO 1 mole K CrO 18.6 mg K CrO / / 10 mg/ K CrO 9.0 g/ K CrO m 10 m M K Cr O c g/ Cu 00.0 m 1 mole Cu 6.55 g 1mole Cu / Cu 1mole Cu 1 10 m M Cu 18. a. Ca(NO ) Ca NO mole Ca(NO) 1.00 M Ca(NO) mole Ca(NO ) 1 mole Ca 1.00 M Ca 1 mole Ca(NO ) 1.00 mole Ca(NO ) mole NO 1 mole Ca(NO ).00 M NO b. Na SO Na SO.5 mole Na SO.0 M Na SO mole Na SO mole Na 1 mole Na SO.0 mole Na SO 1 mole SO 1 mole Na SO.0 M Na.0 M SO

2 c. NH Cl NH Cl 1 mole NH Cl 5.00 g NH Cl 5.9 g NH Cl 0.18 M NH Cl mole NH Cl 1 mole NH 0.18 M NH 1 mole NH Cl 0.18 mole NH Cl 1 mole Cl 1 mole NH Cl d. K K 1.00 g K mole K mole K 1 mole K 1. g K mole K 1 mole K 1 mole 1 mole K 0.18 M Cl M K mole NaOH mole NaOH NaOH Na OH M K M mole mole NaOH NaOH 1mole Na 1mole NaOH 1mole OH 1mole NaOH mole Na mole OH mole mole mole ions 0.00 mole BaCl mole BaCl BaCl Ba Cl mole 1mole Ba BaCl mole Ba 1mole BaCl

3 mole BaCl mole Cl 1mole BaCl mole Cl mole mole mole ions mole Na mole Na Na Na mole Na mole mole Na 1mole Na 0.05 mole Na 1mole Na mole 1mole Na 0.05 mole mole mole ions mole NaOH 0.00 g NaOH mole NaOH.00 g NaOH. a mole H SO mole H SO m diluted to 1.00 b mole HCl mole HCl 0.0 m diluted to 1.00 c mole NiCl g NiCl 6 H O 1mole NiCl 6 H O 1mole NiCl.1g NiCl 6 H O 1mole NiCl 6 H O g NiCl. 6 H O dissolved in enough water to give to 1.00 d mole HNO mole HNO m diluted to 1.00

4 e mole Na CO g Na CO mole Na CO 5 g Na CO 5 g Na CO dissolved in enough water to give to a. FeSO (aq) KCl(aq) NR b. Al(NO ) (aq) Ba(OH) (aq) Al(OH) (s) Ba(NO ) (aq) c. CaCl (aq) Na SO (aq) CaSO (s) NaCl(aq) d. K S(aq) Ni(NO ) (aq) NiS(s) KNO (aq). a. Spectator ions Na (grey) and SO (green) CuSO (aq) Na S(aq) Cu (aq) S (aq) CuS(s) CuS(s) Na SO (aq) b. Spectator ions Na (grey) and Cl (green) CoCl (aq) NaOH(aq) Co (aq) OH (aq) Co(OH) (s) NaCl(aq) Co(OH) (s) c. Spectator ions K (red) and NO - (blue) AgNO (aq) KI(aq) Ag (aq) I (aq) AgI(s) AgI(s) KNO (aq) 6. a. CrCl (aq) NaOH(aq) Cr(OH) (s) NaCl(aq) Cr (aq) OH (aq) Cr(OH) (s) b. AgNO (aq) (NH ) CO (aq) Ag CO (s) NH NO (aq) Ag (aq) CO (aq) Ag CO (s) c. CuSO (aq) Hg (NO) (aq) Cu(NO ) (aq) Hg SO (s) Hg SO Hg SO (s) d. Sr(NO ) (aq) KI(aq) NR

5 0. Pb(NO ) (aq) Na (aq) Pb ( ) (s) 6 NaNO (aq) 0.50 mole Pb(NO) mole Na mole Pb(NO) m Na solution mole Na. BaCl (aq) Fe (SO ) (aq) BaSO (s) FeCl (aq) mole BaCl mole BaSO mole BaCl. g BaSO 1mole BaSO. g BaSO mole Fe (SO ) mole BaSO 1mole Fe (SO ). g BaSO 1mole BaSO.00 g BaSO. AgNO (aq) CaCl (aq) AgCl(s) Ca(NO ) (aq) 0.0 mole AgNO.9 g AgCl mole AgCl mole AgNO 1. g AgCl 1mole AgCl 0.15 mole CaCl. g AgCl mole AgCl 1mole CaCl 1. g AgCl 1mole AgCl Ag : AgNO limiting; 0.00 M Ag Ca : 0.0 mole AgNO mole CaCl mole AgNO mole CaCl used up 0.15 mole CaCl mole CaCl mole CaCl remaining 0.0 mole AgNO 1mole Ca(NO) mole Ca(NO) formed mole AgNO There is 1 mole of Ca / 1 mole of each compound, therefore the total Ca is: mole mole mole (Note: this is identical to moles of CaCl originally added. Ca does not precipitate in this reaction.)

6 0.015 mole Ca M Ca Cl : 0.15 mole CaCl mole CaCl mole CaCl mole Cl 1mole CaCl mole Cl M Cl mole Cl mole CaCl not in AgCl remaining NO : 0.0 mole AgNO 0.00 mole NO mole Ca(NO) mole AgNO 0.10 M NO mole NO 1mole Ca(NO ) 0.00 mole NO 6. a. HNO (aq) Al(OH) (s) Al(NO ) (aq) H O(l) H NO Al(OH) Al NO H O H Al(OH) Al H O b. HC H O (aq) KOH(aq) KC H O (aq) H O(l) HC H O K OH K C H O H O HC H O OH C H O H O c. Ca(OH) (aq) HCl(aq) CaCl (aq) H O(l) Ca OH H Cl Ca Cl H O OH H H O 8. a. AgOH(s) HBr(aq) AgBr(s) H O(l) AgOH H Br AgBr H O Same b. Sr(OH) (aq) HI(aq) SrI (aq) H O(l)

7 Sr OH H I Sr I H O OH H H O c. Cr(OH) (s) HNO (aq) Cr(NO ) (aq) H O(l) Cr(OH) H NO Cr(OH) H Cr H O Cr NO H O 0.00 mole HC mole HCl a. HCl(aq) NaOH(aq) NaCl(aq) H O(l) 1mole NaOH mole HCl mole HCl mole NaOH 50.0 m b. Ba(OH) (aq) HCl(aq) BaCl (aq) H O(l) mole HCl 1 mole Ba(OH) mole HCl mole Ba(OH) m c. HCl(aq) KOH(aq) KCl(aq) H O(l) 1mole KOH mole HCl mole HCl 0.50 mole KOH 0.0 m 56. NaOH(aq) KHC 8 H O (aq) NaKC 8 H O (aq) H O(l) or NaOH(aq) KHP(aq) NaKP(aq) H O(l) 1 mole KHP 1 mole NaOH g/ KHP 0. g/ KHP 1 mole KHP 1.6 m / 10 m / M NaOH 58. a. UO b. As O c. NaBiO d. As e. HAsO f. Mg P O 0 1 5

8 g. Na S O h. Hg Cl i. Ca(NO ) a. i N b. NH c. N H d. NO e. N O f. NO 1 g. NO h. NO i. N a. Cu Ag Ag Cu Ag Ag reduction Cu Cu oidation Cu Ag Cu Ag reducing agent oidizing agent substance oidized substance reduced b. HCl NH NH Cl Not redo c. SiCl H O HCl SiO Not redo d. SiCl Mg MgCl Si SiCl Si reduction Mg MgCl oidation Mg reducing agent SiCl oidizing agent Mg substance oidized SiCl substance reduced e. Al(OH) AlO H O Not redo 1 1

9 6. a. Cu Cu NO NO Cu Cu NO NO H O Cu Cu H NO NO H O Cu Cu e e H NO NO H O (Cu Cu e ) ( e H NO NO H O) 6 e- Cu 8 H NO NO H O Cu 6 e- b. Cr O Cr Cl Cl Cr O Cr Cl Cl Cr O Cr H O Cl Cl 1 H Cr O Cr H O Cl - Cl

10 6 e 1 H Cr O Cr H O Cl Cl e 6 e 1 H Cr O Cr H O ( Cl Cl e ) 6 e- 6 Cl 1 H Cr O Cr H O Cl 6 e- c. Pb H SO PbSO PbO H SO PbSO Pb H SO PbSO PbO H SO PbSO H O Pb H SO PbSO H H PbO H SO PbSO H O Pb H SO PbSO H e e H PbO H SO PbSO H O e- Pb H H SO PbO PbSO H O H e- d. Mn MnO NaBiO Bi Mn MnO NaBiO Bi Na H O Mn MnO NaBiO Bi Na H O

11 H O Mn MnO 8 H 6 H NaBiO Bi Na H O H O Mn MnO 8 H 5 e e 6 H NaBiO Bi Na H O ( H O Mn MnO 8 H 5 e ) 5(e 6 H NaBiO Bi Na H O) 1 10 e- 8 H O Mn 0 H 5 NaBiO MnO 16 H Bi 15 H O 5 Na 10 e- Mn 1 H 5 NaBiO MnO Bi H O 5 Na e. Zn Zn H AsO AsH Zn Zn H AsO AsH H O Zn Zn 8 H H AsO AsH H O Zn Zn e 8 e 8 H H AsO AsH H O (Zn Zn e ) 8 e 8 H H AsO AsH H O

12 8 e- Zn 8 H H AsO AsH H O Zn 8 e- 1 mole/ BaSO 1 mole/ Sac g Sac g/ BaSO g Sac. g/ BaSO 1 mole/ BaSO 1 mole/ Sac g Sac g Sac Tablet 10 Tablets g g Tablet 10 Tablets g Sac % saccharin g Tablets 8. a. Al(s) HCl(aq) AlCl (aq) / H (g) Al(s) 6 HCl(aq) AlCl (aq) H (g) Al Al oidation H H reduction b. CH (g) S(s) CS (l) H S(g) CH CS oidation S CS and H S reduction c. C H 8 (g) 5 O (g) CO (g) H O(l) / C H 8 CO oidation O H O reduction d. Cu(s) Ag (aq) Ag(s) Cu (aq) Cu Cu oidation Ag Ag reduction 9. Assume 100 g of compound: 1 mole C 5.66 g/ C.68 mole C/ g/ C 1.69

13 1 mole H.09 g/ H.06 mole H/ g/ H 1.5 The %O comes from ( ).5 1 mole O.5 g/ O.61 mole O/ g/ O 1 The factor needed to give a whole number is not obvious, but the "formula weight" can be determined: "FW" g/mole The titration gives the actual formula weight: NaOH HCarm NaCarm H O mole NaOH 1mole HCarm mole NaOH mole HCarm 0.60 g HCarm. 10 mole Hcarm 9 g mole 9 g/mole.8 g/mole mole C 5.66 g/ C.68 mole C/ g/ C 1 mole H.09 g/ H.06 mole H/ g/ H 0 1 mole O.5 g/ O.61 mole O/ g/ O 1 C H 0 O 1 or HC H 19 O 1

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