(8) 㖡ࡣ㓟໬ຊࡢ࠶ࡿ⇕⃰◲㓟࡟⁐ࡅ࡚஧㓟໬◲㯤ࡀⓎ⏕ࡍࡿࠋ㸦⟅㸧Cu + 2 H2 SO4 CuSO4 + SO2 + 2 H2 O(9) (a) Ỉ⁐ᾮ A ࡢㄪ〇࡟ᚲせ࡞ CuSO4 · 5 H2 O ࡢ㉁㔞ࡣ㸪
0.10 mol/L × 0.200 L × 250 g/mol = 5.0 g

࡛࠶ࡿࠋࡇࢀࢆṇ☜࡟㔞ࡾྲྀࡗࡓᚋ㸪Ỉࢆຍ࠼࡚ṇ☜࡟ 200 mL ࡜ࡍࢀࡤࡼ࠸ࠋ࠙ゎ⟅౛ࠚ⤖ᬗ 5.0 g ࢆ㟁Ꮚኳ⛗࡛㔞ࡾྲྀࡗ࡚ࣅ࣮࣮࢝࡟ධࢀᑡ㔞ࡢ⣧Ỉ࡛⁐࠿ࡍࠋࡑࢀࢆὙᾮࡶྵࡵ 200 mLࡢ࣓ࢫࣇࣛࢫࢥ࡟₃ᩯࢆ⏝࠸࡚ධࢀ㸪ᶆ⥺ࡲ࡛⣧Ỉࢆຍ࠼࡚᣺ࡾΰࡐࡿࠋ㸦80 Ꮠ㸧(b) Ỉ⁐ᾮ A 200 mL ࡢ㉁㔞ࡣ 200 mL × 1.1 g/mL = 220 g ࡛࠶ࡾ㸪ࡑࡢ࠺ࡕ⁐㉁࡛࠶ࡿ CuSO4 ࡢ㉁㔞ࡣ0.10 mol/L × 0.200 L × 160 g/mol = 3.2 g ࡛࠶ࡿ࠿ࡽ㸪ồࡵࡿ㉁㔞ࣔࣝ⃰ᗘࡣḟࡢࡼ࠺࡟ィ⟬࡛ࡁࡿࠋ
0.10 mol/L × 0.200 L··㸦· ⟅㸧
= 9.2 × 102 mol/kg(220  3.2) × 103 kg࠙ὀࠚィ⟬ࡢ௙᪉࡟ࡼࡗ࡚ࡣ 9.3 × 102 mol/kg ࡟ࡶ࡞ࡿࡢ࡛㸪ࡇࢀࡶྍ࡛࠶ࡿࠋ࠙໬Ꮫ㸦ゎ⟅㸧ࠚ
III(1) 㟁Ẽ࣭⇕ఏᑟᛶࡢ኱ࡁࡉࡣ Ag㸪Cu㸪Au㸪· · · ࡢ㡰࡜࡞ࡿࠋ㖡ࡢ㟁ゎ⢭㘐࡛ࡣ㸪⢒㖡∧ࢆ㝧ᴟ㸪⣧㖡ᯈࢆ㝜ᴟ࡟(1) [H+ ] = [OH ]㸪Kw = [H+ ][OH ] ࡛࠶ࡾ㸪H2 O ࡢ㟁㞳࡟ࡼࡿ H2 O ࡢῶᑡࡣ↓ど࡛ࡁࡿࡢ࡛㸪ồࡵࡿ㟁㞳ᗘࡣḟࡋ࡚㟁ẼศゎࡍࡿࠋCuSO4 · 5 H2 O ࡣ㟷Ⰽࡢ⤖ᬗ࡛㸪Ỉ⁐ᾮࡶ㟷Ⰽ࡜࡞ࡿࡀ㸪ࡇࢀࡣ [Cu(H2 O)4 ]2+ ࡢⰍ࡛࠶ࡿࠋ2+ࡇࢀ࡟㐣๫ࡢ࢔ࣥࣔࢽ࢔Ỉࢆຍ࠼ࡿ࡜㸪㓄఩Ꮚࡀ඲࡚ NH3 ࡟⨨᥮ࡉࢀࡓ῝㟷Ⰽࡢ [Cu(NH3 )4 ]ࢆ⏕ᡂࡍࡿࠋࡇࡢỈ⁐ᾮࢆࢩࣗࣂ࢖ࢶ࢓࣮ヨ⸆࡜࠸࠸㸪ࢭ࣮ࣝࣟࢫࢆཎᩱ࡟ࡋ࡚෌⏕⧄⥔࡛࠶ࡿ㖡࢔ࣥࣔࢽ࢔࣮ࣞࣚࣥ㸦࢟ࣗࣉࣛ㸧ࢆ〇㐀ࡍࡿ࡜ࡁ࡟⏝࠸ࡽࢀࡿࠋ㸦⟅㸧࢔㸸Ag࢖㸸㝧a㸸[Cu(H2 O)4 ]2+࢘㸸㝜࢚㸸ࢩࣗࣂ࢖ࢶ࢓࣮࢜㸸㖡࢔ࣥࣔࢽ࢔࣮ࣞࣚࣥ

b㸸[Cu(NH3 )4 ]2+(2) ప ࡟ࡍࡿ࡯࡝⤖ᬗ᱁Ꮚࡢ⇕᣺ືࡀᙅࡃ࡞ࡗ࡚⮬⏤㟁Ꮚࡀὶࢀࡸࡍࡃ࡞ࡿࡓࡵ㸪㟁Ẽ᢬ᢠࡣᑠࡉࡃ࡞ࡗ࡚࠸ࡃࠋ㸦⟅㸧(B)ࡉࡧ㸦⟅㸧⥳㟷(4) 㖡ࢆ୺ᡂศ࡜ࡍࡿࢫࢬ࡜ࡢྜ㔠ࢆ㟷㖡㸦ࣈࣟࣥࢬ㸧࡜࠸࠺ࠋ㸦⟅㸧㟷㖡㸦ࡲࡓࡣࣈࣟࣥࢬ㸧(5) ᥋ゐἲ࡛ࡣ㸪ゐ፹࡜ࡋ࡚ V2 O5 ࢆ⏝࠸࡚ SO2 ࢆ㓟໬ࡋ࡚ SO3 ࡜ࡋ㸪ࡇࢀࢆ⃰◲㓟࡟྾཰ࡉࡏ࡚Ⓨ↮◲㓟࡟ࡋࡓᚋ㸪ᕼ◲㓟࡜ΰࡐ࡚⃰◲㓟ࢆᚓࡿࠋḟᘧࡼࡾ㸪཯ᛂࡋࡓ SO2 ࡢ≀㉁㔞࡜⏕ᡂࡋࡓ H2 SO4 ࡢ≀㉁㔞ࡣ➼ࡋ࠸ࠋ(2) 30 H C ࡢ࡜ࡁࡢ Kw ࡢ್ࢆ⏝࠸࡚㸪pH ࡣḟࡢࡼ࠺࡟ồࡲࡿࠋrqp
3[H+ ] = Kw = 1.5 × 1014 mol2 /L2 =× 107 mol/L2r31··㸦
· ⟅㸧࠙ὀࠚ6.9 ࡶྍ࡜⪃࠼ࡽࢀࡿࠋ
! pH = 7  log10= 7  (log10 3  log10 2) = 6.91
22(a) 㟁㞳ᗘࡀ 1 ࡟ẚ࡭࡚ᴟࡵ࡚ᑠࡉ࠸ࡢ࡛㸪ḟࡢ㏆ఝᘧ࠿ࡽồࡵࡽࢀࡿࠋpp[H+ ] = Ka C = 1.0 × 105 mol/L × 0.10 mol/L = 1.0 × 103 mol/L! pH = 3.00! pH = 3.50

ࡇࡢ⤖ᯝࡣ [H+ ] ¿ 101 C ࢆ‶ࡓࡋ࡚࠸ࡿࡢ࡛㏆ఝࡣጇᙜ࡛࠶ࡿࠋࡼࡗ࡚ pH ኚ໬ࡣḟࡢࡼ࠺࡟࡞ࡿࠋ

··㸦
· ⟅㸧

3.50  3.00 = 0.50 ቑ(c) 㟁㞳ᗘࢆ(7) (a) 㖡ࡼࡾࡶ࢖࢜ࣥ໬ഴྥࡀᑠࡉ࠸㖟ࡣ㸪ప㟁ᅽࡢࡓࡵ༢యࡢࡲࡲỿẊࡍࡿࠋ㖄ࡣ㖡ࡼࡾࡶ࢖࢜ࣥ໬ഴྥࡀ኱ࡁ
࠸ࡢ࡛࢖࢜ࣥ໬ࡍࡿࡀ㸪◲㓟ሷ࡜࡞ࡗ࡚ỿẊࡍࡿࠋ104 C5

1.0 × 10㸦⟅㸧Ag㸪PbSO4(b) ὶࢀࡓ e ࡢ≀㉁㔞ࡣ࡛࠶ࡿࠋ㝜ᴟ࡛ࡢ཯ᛂࡣ Cu2+ + 2 e  Cu ࡞ࡢ࡛㸪ồࡵࡿ㉁㔞ࡣḟࡢࡼ࠺࡟࡞ࡿࠋ
11.20 mol × × 64 g/mol = 38.4 g
··㸦
· ⟅㸧
2··㸦
· ⟅㸧

࡜ࡍࡿ࡜㸪࢜ࢫࢺ࣡ࣝࢺࡢᕼ㔘ᚊࡼࡾḟࡢ㛵ಀࡀᡂࡾ❧ࡘࠋ104 C 2
Ka =1

2 Cu + SO2

9.65 A × (3 × 60 + 20) × 60 s
= 1.20 mol
9.65 × 104 C/mol··㸦· ⟅㸧࠙ὀࠚ3.0 ࡶྍ࡜⪃࠼ࡽࢀࡿࠋ

(b) (a) ࡜ྠᵝ࡟㏆ఝᘧࢆ⏝࠸ࡿ࡜㸪10 ಸ࡟ᕼ㔘ࡋࡓᚋࡢ pH ࡣḟࡢࡼ࠺࡟࡞ࡿࠋ
pp[H+ ] = Ka × 101 C = 1.0 × 105 mol/L × 101 × 0.10 mol/L = 103.50 mol/L2 ࡛⏕ᡂࡋࡓ Cu2 S ࡣ㌿⅔࡟⛣ࡋ㸪ᙉ⇕ࡋ࡞ࡀࡽ✵Ẽࢆ྿ࡁ㎸ࡳ㸪S2 ࢆ SO2 ࡜ࡋ࡚㝖ࡃࠋ(6) ୗ⥺㒊 °㸦⟅㸧Cu2 S + O2 ··㸦
· ⟅㸧(3) C = 0.10 mol/L ࡜ࡍࡿࠋࢁࡃࡋࡻ࠺

(3) 㖡ࡀ㓟໬ࡉࢀ࡚⏕ᡂࡍࡿ⥳Ⰽࡢ㗵ࡣ ⥳ 㟷 ࡜࿧ࡤࢀࡿࠋࡇࢀࡣ㖡ࡢⅣ㓟ሷࡸ◲㓟ሷ࡞࡝ࡢΰྜ≀࡛࠶ࡿࠋ

2 SO2 + O2  2 SO3 , SO3 + H2 O  H2 SO42.76 kg
6100× × 1 × 98 g/mol ×= 2.25 kg
184 g/mol
498.0ࡢࡼ࠺࡟࡞ࡿࠋ
q$
1.0 × 1014 mol2 /L2[H+ ]Kw= 1.8 × 109==[H2 O][H2 O]
103 mL × 1.0 g/mL
18 g/mol(4) NaOH 2+ 1.0 × 10

52+ Ka  K a = 0 1.0 × 105 = 0$
1 + 5! == 0.60··㸦· ⟅㸧
2+8Na + OH ࡟ࡼࡾ⏕ࡌࡓ OH ࡣ 1.0 × 10 mol/L ࡛࠶ࡿࠋH2 O À H+ + OH ࡟ࡼࡾ⏕ࡌࡓ H+࡜ OH ࡢࣔࣝ⃰ᗘࢆ࡜ࡶ࡟ x mol/L ࡜ࡍࡿ࡜㸪[H+ ][OH ] = Kw ࡼࡾḟࡢࡼ࠺࡟࡞ࡿࠋ¡¢x mol/L × 1.0 × 108 + x mol/L = 1.0 × 1014 mol2 /L2x2 + 108 x  1014 = 0! x mol/L =108 +$

4.01 × 107= 9.5 × 108 mol/L2··㸦· ⟅㸧III(e) ໬ྜ≀ A ࡟㸪࢔࣑ࢻ⤖ྜࡔࡅ㑅ᢥⓗ࡟ຍỈศゎࡍࡿ㓝⣲ࢆຍ࠼ࡓ࡜ࡁ㸪໬ྜ≀ C㸦࢔ࢫࣃࣛࢠࣥ㓟㸧࡜໬ྜ≀ F ࡀᚓࡽࢀࡓࡇ࡜࠿ࡽ㸪໬ྜ≀ F ࡣࣇ࢙ࢽࣝ࢔ࣛࢽࣥࡢ࣓ࢳ࢚ࣝࢫࢸࣝ࡜ศ࠿ࡿࠋ㢟ពࡼࡾ㸪࢔ၥ (1) (a) ⬺Ⅳ㓟཯ᛂ࡟ࡼࡾ࣓ࢱࣥࡀⓎ⏕ࡍࡿࠋ㸦⟅㸧CH3 COONa + NaOH ࢫࣃࣛࢠࣥ㓟ࡢ a ఩ࡢⅣ⣲࡟⤖ྜࡋ࡚࠸ࡿ࢝ࣝ࣎࢟ࢩᇶ࡜㸪ࣇ࢙ࢽࣝ࢔ࣛࢽࣥࡢ࣓ࢳ࢚ࣝࢫࢸࣝࡢ࢔࣑

CH4 + Na2 CO3ࣀᇶ࡜ࡀ࢔࣑ࢻ⤖ྜࡋ࡚⏕ᡂࡋࡓࡶࡢࡀ໬ྜ≀ A ࡛࠶ࡿࠋ࡞࠾㸪ࡇࡢேᕤ⏑࿡ᩱࡣ࢔ࢫࣃࣝࢸ࣮࣒࡜࠸

(b) 4 ࡘࡢ H ཎᏊࡀసࡿṇ᪉ᙧ࡟ࡘ࠸࡚㸪2 ࡘࡢ X ࡀ୍㎶ࢆඹ᭷ࡍࡿ␗ᛶయ࡜㸪2 ࡘࡢ X ࡀᑐゅ⥺ୖ࡟࠶ࡿ࠺㸦ၥ㢟ᩥ࡟ㄗ᳜ࡀ࠶ࡿ㸧ࠋ␗ᛶయࡢ 2 ✀㢮ࡀ࠶ࡿࠋ

㸦⟅㸧

㸦⟅㸧

(c) (b) ࡢᕥഃ࡟ᑐᛂࡍࡿࡶࡢ࡛ࡣ 2 ࡘࡢ X 㛫ࡢ㊥㞳ࡀ㛗࠸ࡶࡢ࡜▷࠸ࡶࡢࡢ 2 ✀㢮ࡀ࠶ࡿࠋ(b) ࡢྑഃ࡟ᑐᛂࡍࡿࡶࡢ࡛ࡣ㸪஫࠸࡟㙾ീ㛵ಀ࡟࠶ࡿ 1 ⤌ࡢ␗ᛶయࡀᏑᅾࡍࡿࠋ

࠙໬Ꮫ㸦ㅮホ㸧ࠚ᫖ᖺᗘ࠿ࡽጞࡲࡗࡓᚋᮇࡢ་Ꮫ㒊⊂⮬ၥ㢟ࡣ㞴ᗘࡀ㧗࠿ࡗࡓࡀ㸪௒ᅇࡣ୍㌿ࡋ࡚ᖹ᫆࡟࡞ࡗࡓࠋᮏᖺᗘࡢ๓ᮇ࡜ẚ࡭࡚ࡶྲྀࡾ⤌ࡳࡸࡍ࠸ၥ㢟ࡤ࠿ࡾ࡛࠶ࡗࡓࠋ

I ࡣ㖡࡟㛵ࡍࡿ⥲ྜၥ㢟࡛࠶ࡾ㸪㖡ࡢᛶ㉁ࡸ〇㘐㸪࠾ࡼࡧ㘒࢖࢜ࣥࡸ㖡࢔ࣥࣔࢽ࢔࣮ࣞࣚࣥ࡞࡝ᖜᗈࡃ▱㆑ࡀၥࢃ㸦⟅㸧4 ✀㢮ࢀ࡚࠸ࡿࠋ㏵୰࡟ࡣ◲㓟ࡢᕤᴗⓗ〇ἲ࡛࠶ࡿ᥋ゐἲࡶᢅࢃࢀ࡚࠾ࡾ㸪Ꮫ⩦ෆᐜࢆᗈࡃ࢝ࣂ࣮࡛ࡁࡓ࠿ࡀ࣏࢖ࣥࢺ࡛࠶

ၥ (2) (a) ໬ྜ≀ A ࢆ᏶඲࡟ຍỈศゎࡍࡿ࡜ a-࢔࣑ࣀ㓟 C ࡜ D ࡀᚓࡽࢀࡓࡢ࡛㸪໬ྜ≀ A ୰ࡢ N ཎᏊࡣᑡ࡞ࡃ
࡜ࡶ 2 ಶ࡛࠶ࡿࠋࡑࡢಶᩘࢆ n ಶ࡜ࡍࡿ࡜㸪N ࡢ㉁㔞ࣃ࣮ࢭࣥࢺࡼࡾ㸪໬ྜ≀ A ࡢศᏊ㔞࡟ࡘ࠸࡚ၥࡢࡼ࠺࡞୎ᑀ࡞ㄏᑟࡀ࡞ࡃ࡚ࡶゎࡅࡿࡼ࠺࡟ࡋ࡚࠾ࡁࡓ࠸ࠋࡢ㛵ಀࡀ࠶ࡿࠋࡇࢀࢆ‶ࡓࡍ n ࡣ 2 ࡢࡳ࡛࠶ࡾ㸪໬ྜ≀ A ࡢศᏊ㔞ࡀ 147n = 274 ࡜Ỵᐃࡍࡿࠋࡼࡗ࡚㸪໬ྜ≀ A 1 mol ୰ࡢ C㸪H㸪O ࡢ≀㉁㔞ࡣ㸪ࡑࢀࡒࢀḟࡢࡼ࠺࡟࡞ࡿࠋ

274 g × 0.0610= 18 mol,1.0 g/mol

274 g × 0.272= 5 mol
16 g/molࡼࡗ࡚໬ྜ≀ A ࡢศᏊᘧࡣ C14 H18 N2 O5 ࡛࠶ࡿࠋ㸦⟅㸧C14 H18 N2 O5

㸦⟅㸧HCOOH + NaHCO3 

HCOONa + CO2 + H2 O(c)㸦⟅㸧࢔ࣝࢹࣄࢻᇶ(d) ໬ྜ≀ A ࡢຍỈศゎ࡛ᚓࡽࢀࡓ໬ྜ≀ B ࢆ㓟໬ࡍࡿ࡜ࢠ㓟࡟࡞ࡿࡢ࡛㸪໬ྜ≀ B ࡣ࣓ࢱࣀ࣮࡛ࣝ࠶ࡿࠋ
໬ྜ≀ D ࡢศᏊ㔞ࢆ x ࡜ࡍࡿ࡜㸪จᅛⅬ㝆ୗᗘࡢ ᐃ⤖ᯝࡼࡾḟࡢ㛵ಀࡀᡂࡾ❧ࡘࠋ

0.512 K = 5.12 K · kg/mol ×3.30 g
1×x g/mol
0.200 kg

! x = 165ࡼࡗ࡚㸪a-࢔࣑ࣀ㓟 D ࡣࣇ࢙ࢽࣝ࢔ࣛࢽࣥ㸦ศᏊᘧ C9 H11 NO2 㸧࡜Ỵᐃࡍࡿࠋ໬ྜ≀ A ࡢຍỈศゎࡣḟᘧࡢࡼ࠺࡟⾲ࡉࢀࡿࠋ

CH3 OH + (a-࢔࣑ࣀ㓟 C) + C9 H11 NO2ࡇࢀࡼࡾ a-࢔࣑ࣀ㓟 C ࡢศᏊᘧࡣ C4 H7 NO4 ࡜Ỵࡲࡿࠋ㢟ពࡼࡾ㸪ࡇࢀࡣ㓟ᛶ࢔࣑ࣀ㓟ࡢ࢔ࢫࣃࣛࢠࣥ㓟࡜ศ࠿ࡿࠋ㸦⟅㸧

III ၥ (1) ࡣ࣓ࢱࣥࢆ୰ᚰ࡜ࡋࡓฟ㢟࡛㞴ࡋ࠸㒊ศࡣ࡞࠸ࡀ㸪ⴠࡕ╔࠸࡚⪃࠼ࡿࡇ࡜ࡀ኱ษ࡛࠶ࡿࠋࡓࡔࡋ㸪(c) ࡛ࡣ㙾ീ㛵ಀ࡟࠶ࡿ␗ᛶయࢆᛀࢀࡸࡍ࠸ࡢ࡛ὀពࡋࡼ࠺ࠋၥ (2) ࡣேᕤ⏑࿡ᩱ࢔ࢫࣃࣝࢸ࣮࣒ࡢᵓ㐀Ỵᐃ࡛࠶ࡿࡀ㸪࢔ࢫࣃࣝࢸ࣮࣒ࡣ௒ࡲ࡛Ⰽࠎ࡞኱Ꮫ࡛ฟ㢟ࡉࢀ࡚ࡁࡓ໬ྜ≀࡞ࡢ࡛⤖ᯝࢆ▱ࡗ࡚࠸ࡿேࡶከ࠿ࡗࡓࡢ࡛ࡣ࡞࠸࠿ࠋࡑࡢព࿡࡛ᕪࡀฟࡸࡍ࠸ࠋ୍ᛂ㸪๓ᥦ࡜࡞ࡿ▱㆑ࡀ࡞ࡃ࡚ࡶゎࡅࡿࡼ࠺࡟࡞ࡗ࡚࠸ࡿࡀ㸪ศᏊᘧࡢỴᐃ࡛ࡘࡲࡎࡃ࡜ࡲࡎ࠸ࠋᮏ✏ࡢࡼ࠺࡟せ㡿ࡼࡃゎࡁࡓ࠸ࠋ඲య࡜ࡋ࡚ᖹ᫆࡟࡞ࡾ㸪㧗ࣞ࣋ࣝࡢᡓ࠸࡟࡞ࡗࡓ࡜ᛮࢃࢀࡿࠋᇶᮏⓗ࣭ᶆ‽ⓗ࡞ၥ㢟ࢆྲྀࡾࡇࡰࡉࡎ㸪⁐ᾮࡢㄪ〇

1 ࡼࡾ࢝ࣝ࣎ࣥ㓟࡜ศ࠿ࡾ㸪ୗ⥺㒊 °2 ࡼࡾ㑏ඖᛶࢆ♧ࡍࡢ࡛ࢠ㓟࡜Ỵᐃࡍࡿࠋ(b) ໬ྜ≀ E ࡣୗ⥺㒊 °C14 H18 N2 O5 + 2 H2 O 

ࡢㄪ〇࡟ࡘ࠸࡚ฟ㢟ࡉࢀࡿࡇ࡜ࡀከ࠸ࠋII ࡣỈࡢ㟁㞳ࢆ⪃៖ࡍࡿሙྜࢆ୰ᚰ࡟ィ⟬ࡉࡏࡿࡶࡢ࡛㸪㢮㢟ࡢᏛ⩦⤒㦂ࡢ᭷↓࡛ᕪࡀ௜ࡁࡸࡍ࠸ၥ㢟࡛࠶ࡿࠋᮏ

14n= 147n 5 300 (n = 2)
0.0950274 g × 0.572= 14 mol,12 g/molࡿࠋ(9) (a) ࡢỈ⁐ᾮࡢㄪ〇ࡢグ㏙ࡣᩥᏐᩘࡀࢱ࢖ࢺ࡛࠺ࡲࡃ཰ࡵࡿࡢ࡟ⱞປࡋࡓ࠿ࡶࡋࢀ࡞࠸ࠋ㏆␥኱࡛ࡣỈ⁐ᾮࡢグ㏙࠾ࡼࡧ㟁㞳ᖹ⾮ࡢィ⟬ࡀࡋࡗ࠿ࡾ࡛ࡁࢀࡤ኱୔ኵ࡛࠶ࡿࠋᐃဨࡢᑡ࡞ࡉࢆ⪃៖ࡍࡿ࡜ 85 % ࡢᚓⅬ⋡ࡣ☜ಖࡋࡓ࠸ࠋ