55. Kally karbonatning $$ 40^{\circ} \mathrm{C} $$ dagi eruvchanligi 130 ga teng bo'lsa, ushbu erilmaning $$ (p=1,62 \mathrm{~g} / \mathrm{ml}) $$ molyar konsentratsiyasini ( $$ \mathrm{mol} / \mathrm{l} $$ )hisoblang. A) 4,6 B) 6,6 C) 3,4 D) 8,2 56. 100 g suvda $$ 80^{\circ} \mathrm{C} $$ da $$ 520 \mathrm{~g}, 30^{\circ} \mathrm{C} $$ da esa 220 g kurmush nitrat eridi. Kumush nitratning $$ 80^{\circ} \mathrm{C} $$ dagi 1240 g to'yingan critmasi $$ 30^{\circ} \mathrm{C} $$ gacha sovutilganda cho'kmaga tushadigan kumush nitratning massasini (g)hisoblang A) 450 B) 600 C) 256 D) 300 57. 100 g suvda $$ 110^{\circ} \mathrm{C} $$ da $$ 160 \mathrm{~g} \cdot 0^{\circ} \mathrm{C} $$ da csa 110 g kaliy karbonat cridi. Kaliy karbonatning 390 g to $$ { }^{\circ} $$ yingan $$ \left(110^{\circ} \mathrm{Cda}\right) $$ eritmasi $$ 0^{\circ} \mathrm{C} $$ gacha sovutilganda cho kmaga tushadigan kaliy karbonatning massasimi (g)hisoblang. A) 56 B) 75 C) 49 D) 84 58. Kally bromidning $$ 80^{\circ} \mathrm{C} $$ dagi to yingan eritmasi $$ 20^{\circ} \mathrm{C} $$ gacha sovutilganda 90 g cho kma tushgan bo'lsa, ushbu to yingan eritmant $$ \left(80^{\circ} \mathrm{C}\right. $$ da) tayyorlash uchun zarur bo'lgan kaliy bromid va suvning massasini (g) hisoblang. $$ S\left(20^{\circ} \mathrm{C}\right)=60 ; S\left(80^{\circ} \mathrm{C}\right)=90 $$ A) $$ 270 ; 300 $$ B) $$ 250 ; 320 $$ C) $$ 200 ; 370 $$ D) 190; 380 59. Kaliy bromidning $$ 90^{\circ} \mathrm{C} $$ dagi to yingan eritmasi $$ 30^{\circ} \mathrm{C} $$ gacha sovutilganda. 120 g tuz cho kmaga tushgan bo'lsa, ushbu to yingan eritmani $$ \left(90^{\circ} \mathrm{Cda}\right) $$ tayyorlash uchun zarur bo'lgan kaliy bromid va stivning massasini (g)aniqlang. $$ S\left(30^{\circ} \mathrm{C}\right)=70 ; S\left(90^{\circ} \mathrm{C}\right)=100 $$ A) $$ 450 ; 350 $$ B) $$ 400 ; 400 $$ C) $$ 380 ; 630 $$ D) $$ 555 ; 245 $$

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Quyidagi kimyo masalalariga javoblarni keltiraman:

### 55. Kaliy karbonatning eruvchanligini aniqlash

**Ma'lumotlar:**
- 40°C dagi eruvchanlik: 130 g/100 g suv
- Eritmaning zichligi: $$ p = 1,62 \, 	ext{g/ml} $$
- Kaliy karbonat ($$ 	ext{K}_2	ext{CO}_3 $$) molyar massasi: $$ 138.2 \, 	ext{g/mol} $$

**Hisoblash:**
1. 100 g suvga 130 g K₂CO₃ qo'shish bilan umumiy eritma massasi: $$ 130 + 100 = 230 \, 	ext{g} $$.
2. Eritmaning hajmi: $$ \frac{230 \, 	ext{g}}{1,62 \, 	ext{g/ml}} \approx 141,975 \, 	ext{ml} = 0,141975 \, 	ext{L} $$.
3. Mol soni: $$ \frac{130 \, 	ext{g}}{138,2 \, 	ext{g/mol}} \approx 0,941 \, 	ext{mol} $$.
4. Molyar konsentratsiya: $$ \frac{0,941 \, 	ext{mol}}{0,141975 \, 	ext{L}} \approx 6,62 \, 	ext{mol/L} $$.

**Javob:**  
**B) 6,6**

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### 56. Kumush nitratning cho'kmaga tushuvchi massasi

**Ma'lumotlar:**
- 80°C dagi eruvchanlik: 520 g/100 g suv
- 30°C dagi eruvchanlik: 220 g/100 g suv
- Eritma massasi: 1240 g (80°C)
  
**Hisoblash:**
1. 80°C dagi eritmada:  
   $$ 	ext{AgNO}_3 $$ massasi: $$ \frac{520}{620} 	imes 1240 \approx 1040 \, 	ext{g} $$  
   Suv massasi: $$ 1240 - 1040 = 200 \, 	ext{g} $$
2. 30°C dagi maksimal erishuv: $$ 220 	imes 2 = 440 \, 	ext{g} $$
3. Cho'kadigan massa: $$ 1040 - 440 = 600 \, 	ext{g} $$

**Javob:**  
**B) 600**

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### 57. Kaliy karbonatning cho'kmaga tushuvchi massasi

**Ma'lumotlar:**
- 110°C dagi eruvchanlik: 160 g/100 g suv
- 0°C dagi eruvchanlik: 110 g/100 g suv
- Eritma massasi: 390 g (110°C)

**Hisoblash:**
1. Eritmada:
   - $$ 	ext{K}_2	ext{CO}_3 $$ massasi: $$ \frac{160}{260} 	imes 390 \approx 240 \, 	ext{g} $$
   - Suv massasi: $$ 150 \, 	ext{g} $$
2. 0°C dagi maksimal erishuv: $$ 110 	imes 1,5 = 165 \, 	ext{g} $$
3. Cho'kadigan massa: $$ 240 - 165 = 75 \, 	ext{g} $$

**Javob:**  
**B) 75**

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### 58. Kaliy bromidning kerakli massasi

**Ma'lumotlar:**
- 80°C dagi eruvchanlik: 90 g/100 g suv
- 20°C dagi eruvchanlik: 60 g/100 g suv
- 90 g cho'kgan masa

**Hisoblash:**
1. Let:
   - $$ x = $$ KBr massasi
   - $$ y = $$ suv massasi
   - $$ \frac{x}{y} = \frac{90}{100} \Rightarrow x = 0,9y $$
2. Sovutishda:
   $$ x - 0,6y = 90 $$
3. $$ 0,9y - 0,6y = 0,3y = 90 \Rightarrow y = 300 \, 	ext{g} $$
4. $$ x = 0,9 	imes 300 = 270 \, 	ext{g} $$

**Javob:**  
**A) 270 ; 300**

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### 59. Kaliy bromidning kerakli massasi

**Ma'lumotlar:**
- 90°C dagi eruvchanlik: 100 g/100 g suv
- 30°C dagi eruvchanlik: 70 g/100 g suv
- 120 g cho'kgan masa

**Hisoblash:**
1. Let:
   - $$ x = $$ KBr massasi
   - $$ y = $$ suv massasi
   - $$ \frac{x}{y} = 1 \Rightarrow x = y $$
2. Sovutishda:
   $$ x - 0,7y = 120 $$
   $$ y - 0,7y = 0,3y = 120 \Rightarrow y = 400 \, 	ext{g} $$
3. $$ x = 400 \, 	ext{g} $$

**Javob:**  
**B) 400 ; 400**

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Agar qo'shimcha savollaringiz bo'lsa yoki boshqa masalalarni yechishni xohlasangiz, bemalol so'rang!
**55. Kaliy karbonatning molyar konsentratsiyasi 6,6 mol/L.** **56. Cho'kadigan kumush nitrat massasi 600 g.** **57. Cho'kadigan kaliy karbonat massasi 75 g.** **58. Kaliy bromid massasi 270 g va suv massasi 300 g.** **59. Kaliy bromid massasi 400 g va suv massasi 400 g.**

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