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ɏɨɞ ɪɚɛɨɬɵ.
– ɉɭɫɬɨɣ ɫɬɚɤɚɧɱɢɤ (ɢɥɢ ɤɨɥɛɭ) ɜɡɜɟɲɢɜɚɸɬ ɧɚ ɜɟɫɚɯ, ɦɚɫɫɭ ɡɚɩɢɫɵ-
ɜɚɸɬ ɜ ɬɟɬɪɚɞɶ.
– Ɉɬɦɟɪɹɸɬ ɦɟɪɧɵɦ ɰɢɥɢɧɞɪɨɦ 50 ɦɥ ɇɋ1 4Ɇ, ɩɟɪɟɥɢɜɚɸɬ ɤɢɫɥɨɬɭ
ɜ ɫɬɚɤɚɧ (ɢɥɢ ɤɨɥɛɭ) ɧɚ 100 ɦɥ, ɫɬɚɜɹɬ ɧɚ ɦɚɝɧɢɬɧɭɸ ɦɟɲɚɥɤɭ ɢ ɩɨɝɪɭɠɚɸɬ
ɜ ɪɚɫɬɜɨɪ ɞɚɬɱɢɤ ɬɟɦɩɟɪɚɬɭɪɵ. Ɂɚɩɭɫɤɚɸɬ ɩɟɪɟɦɟɲɢɜɚɧɢɟ. ɂɡɦɟɪɹɸɬ ɬɟɦ-
ɩɟɪɚɬɭɪɭ ɢ ɟɟ ɡɧɚɱɟɧɢɟ ɡɚɩɢɫɵɜɚɸɬ (Ɍ
1
).
– ȼɨ ɜɬɨɪɨɣ ɦɟɪɧɵɣ ɰɢɥɢɧɞɪ ɨɬɛɢɪɚɸɬ 50 ɦɥ NɚɈɇ 4Ɇ ɢ ɜɵɥɢɜɚɸɬ
ɷɬɨɬ ɪɚɫɬɜɨɪ ɜ ɫɬɚɤɚɧ ɫ ɇɋl. ɉɪɨɬɟɤɚɧɢɟ ɪɟɚɤɰɢɢ ɫɨɩɪɨɜɨɠɞɚɟɬɫɹ ɜɵɞɟɥɟ-
ɧɢɟɦ ɬɟɩɥɨɬɵ, ɬɟɦɩɟɪɚɬɭɪɚ ɪɚɫɬɜɨɪɚ ɪɟɡɤɨ ɩɨɜɵɲɚɟɬɫɹ. Ʉɚɤ ɬɨɥɶɤɨ ɬɟɦɩɟ-
ɪɚɬɭɪɚ ɫɬɚɛɢɥɢɡɢɪɭɟɬɫɹ (10–15 ɫ), ɟɟ ɡɧɚɱɟɧɢɟ ɡɚɩɢɫɵɜɚɸɬ (Ɍ
2
).
– ȼɡɜɟɲɢɜɚɸɬ ɫɬɚɤɚɧ ɫ ɪɚɫɬɜɨɪɨɦ ɩɨɫɥɟ ɪɟɚɤɰɢɢ, ɦɚɫɫɭ ɡɚɩɢɫɵɜɚɸɬ.
Ⱥɧɚɥɨɝɢɱɧɵɟ ɨɩɟɪɚɰɢɢ ɩɨɜɬɨɪɹɸɬ ɫ ɩɚɪɨɣ ɇɋ1—KOH, ɚ ɡɚɬɟɦ
ɇɋ1—Ʉ
2
ɋɈ (ɜ ɩɨɫɥɟɞɧɟɦ ɫɥɭɱɚɟ ɩɪɢɥɢɜɚɬɶ ɦɟɞɥɟɧɧɨ, ɱɬɨɛɵ ɢɡɛɟɠɚɬɶ
3
ɨɛɪɚɡɨɜɚɧɢɹ ɩɟɧɵ). ɉɨɫɭɞɭ ɢ ɹɤɨɪɶ ɦɚɝɧɢɬɧɨɣ ɦɟɲɚɥɤɢ ɦɟɠɞɭ ɷɤɫɩɟɪɢ-
ɦɟɧɬɚɦɢ ɦɨɸɬ ɞɢɫɬɢɥɥɢɪɨɜɚɧɧɨɣ ɜɨɞɨɣ.
Ɉɛɪɚɛɨɬɤɚ ɪɟɡɭɥɶɬɚɬɨɜ.
Ɍɟɩɥɨɜɨɣ ɷɮɮɟɤɬ ɤɚɠɞɨɣ ɪɟɚɤɰɢɢ (Ⱦɠ/(ɦɨɥɶ)) ɜɵɱɢɫɥɹɸɬ ɩɨ ɮɨɪɦɭɥɟ
Q = ǻT· (ɫ · m + ɫ · m )/ (ɋ · V
ɪ-ɪɚ ɪ-ɪɚ ɫɬɟɤɥɚ ɫɬɚɤɚɧɚ 11
) , (1)
ɝɞɟ ǻT = (Ɍ
2
– Ɍ
1
) – ɢɡɦɟɧɟɧɢɟ ɬɟɦɩɟɪɚɬɭɪɵ ɪɚɫɬɜɨɪɚ;
C–ɦɨɥɹɪɧɚɹ ɤɨɧɰɟɧɬɪɚɰɢɹ (ɜ ɦɨɥɶ/ɥ) ɪɚɫɬɜɨɪɚ ɜɟɳɟɫɬɜɚ, ɩɟɪɟɞ ɤɨ-
1
ɬɨɪɵɦ ɜ ɭɪɚɜɧɟɧɢɢ ɫɬɨɢɬ ɫɬɟɯɢɨɦɟɬɪɢɱɟɫɤɢɣ ɤɨɷɮɮɢɰɢɟɧɬ 1;
V
1
– ɢɫɯɨɞɧɵɣ ɨɛɴɟɦ ɷɬɨɝɨ ɠɟ ɪɚɫɬɜɨɪɚ (ɥ);
ɫ – ɭɞɟɥɶɧɚɹ ɬɟɩɥɨɟɦɤɨɫɬɶ ɩɨɥɭɱɢɜɲɟɝɨɫɹ ɪɚɫɬɜɨɪɚ (ɩɪɢɧɹɬɶ
ɪ-ɪɚ
ɩɪɢɦɟɪɧɨ ɪɚɜɧɨɣ ɭɞɟɥɶɧɨɣ ɬɟɩɥɨɟɦɤɨɫɬɢ ɜɨɞɵ 4,18 Ⱦɠ/ɝ·Ʉ);
m – ɢɬɨɝɨɜɚɹ ɦɚɫɫɚ ɪɚɫɬɜɨɪɚ (ɝ);
ɪ-ɪɚ
ɫ – ɭɞɟɥɶɧɚɹ ɬɟɩɥɨɟɦɤɨɫɬɶ ɫɬɟɤɥɚ, ɢɡ ɤɨɬɨɪɨɝɨ ɢɡɝɨɬɨɜɥɟɧ ɫɬɚɤɚɧ;
ɫɬɟɤɥɚ
m – ɦɚɫɫɚ ɩɭɫɬɨɝɨ ɫɬɚɤɚɧɚ (ɝ).
ɫɬɚɤɚɧɚ
ɂɬɨɝɨɜɚɹ ɦɚɫɫɚ ɪɚɫɬɜɨɪɚ (m ) ɜɵɱɢɫɥɹɟɬɫɹ ɤɚɤ ɪɚɡɧɨɫɬɶ ɦɚɫɫ ɫɬɚ-
ɪ-ɪɚ
ɤɚɧɚ ɫ ɪɚɫɬɜɨɪɨɦ ɩɨ ɨɤɨɧɱɚɧɢɢ ɨɩɵɬɚ ɢ ɩɭɫɬɨɝɨ ɫɬɚɤɚɧɚ. ɍɞɟɥɶɧɚɹ ɬɟɩɥɨ-
ɟɦɤɨɫɬɶ ɫɬɟɤɥɚ ɦɚɪɤɢ «ɩɢɪɟɤɫ», ɢɡ ɤɨɬɨɪɨɝɨ ɨɛɵɱɧɨ ɢɡɝɨɬɚɜɥɢɜɚɸɬ ɯɢɦɢ-
ɱɟɫɤɭɸ ɩɨɫɭɞɭ, ɫɨɫɬɚɜɥɹɟɬ 0,859 Ⱦɠ/ (ɝ·Ʉ) (ɩɪɢ Ɍ= 273–573 Ʉ).
Ɂɚɩɢɲɢɬɟ ɬɟɪɦɨɯɢɦɢɱɟɫɤɢɟ ɭɪɚɜɧɟɧɢɹ ɩɪɨɞɟɥɚɧɧɵɯ ɪɟɚɤɰɢɣ.
Ʉɨɧɬɪɨɥɶɧɵɟ ɜɨɩɪɨɫɵ.
1. Ʉɚɤ ɢɡɦɟɧɢɬɫɹ ɮɨɪɦɭɥɚ ɞɥɹ ɪɚɫɱɟɬɚ ɬɟɩɥɨɜɨɝɨ ɷɮɮɟɤɬɚ, ɟɫɥɢ ɜ ɧɟɟ
ɩɨɞɫɬɚɜɢɬɶ ɤɨɧɰɟɧɬɪɚɰɢɸ ɜɟɳɟɫɬɜɚ, ɩɟɪɟɞ ɤɨɬɨɪɵɦ ɫɬɨɢɬ ɫɬɟɯɢɨɦɟɬɪɢɱɟ-
ɫɤɢɣ ɤɨɷɮɮɢɰɢɟɧɬ n?
2. Ʉɚɤ ɨɛɴɹɫɧɢɬɶ ɨɞɢɧɚɤɨɜɵɣ ɬɟɩɥɨɜɨɣ ɷɮɮɟɤɬ ɪɟɚɤɰɢɣ 1 ɢ 2?
3. ɑɟɦ ɨɛɭɫɥɨɜɥɟɧɵ ɨɬɤɥɨɧɟɧɢɹ ɩɨɥɭɱɟɧɧɨɝɨ ɡɧɚɱɟɧɢɹ ɬɟɩɥɨɜɨɝɨ
ɷɮɮɟɤɬɚ ɪɟɚɤɰɢɢ ɨɬ ɢɫɬɢɧɧɨɝɨ?
4. Ʉɚɤɢɟ ɢɡɦɟɧɟɧɢɹ ɧɭɠɧɨ ɜɧɟɫɬɢ ɜ ɦɟɬɨɞɢɤɭ ɢɡɦɟɪɟɧɢɣ ɢ ɪɚɫɱɟɬɨɜ,
ɱɬɨɛɵ ɩɨɜɵɫɢɬɶ ɩɪɚɜɢɥɶɧɨɫɬɶ ɩɨɥɭɱɟɧɧɨɝɨ ɪɟɡɭɥɶɬɚɬɚ?
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ɋɩɢɫɨɤ ɥɢɬɟɪɚɬɭɪɵ
1. ɍɝɚɣ ə.Ⱥ. Ɉɛɳɚɹ ɢ ɧɟɨɪɝɚɧɢɱɟɫɤɚɹ ɯɢɦɢɹ / ə.Ⱥ. ɍɝɚɣ. – Ɇ. : ȼɵɫɲ. ɲɤ.,
2007. – 527 ɫ.
2. ɋɭɜɨɪɨɜ Ⱥ.ȼ. Ɉɛɳɚɹ ɯɢɦɢɹ / Ⱥ.ȼ. ɋɭɜɨɪɨɜ, Ⱥ.Ȼ. ɇɢɤɨɥɶɫɤɢɣ. – ɋɉɛ. :
ɏɢɦɢɡɞɚɬ, 2000. – 622 ɫ.
3. ɏɚɭɫɤɪɨɮɬ Ʉ. ɋɨɜɪɟɦɟɧɧɵɣ ɤɭɪɫ ɨɛɳɟɣ ɯɢɦɢɢ: ɜ 2 ɬ. / Ʉ. ɏɚɭɫɤɪɨɮɬ,
ɗ. Ʉɨɧɫɬɟɛɥ. – Ɇ. : Ɇɢɪ, 2002.
4. Ƚɥɢɧɤɚ ɇ.Ʌ. Ɂɚɞɚɱɢ ɢ ɭɩɪɚɠɧɟɧɢɹ ɩɨ ɨɛɳɟɣ ɯɢɦɢɢ : ɭɱɟɛɧɨɟ ɩɨɫɨɛɢɟ
ɞɥɹ ɜɭɡɨɜ / ɇ.Ʌ. Ƚɥɢɧɤɚ. – Ɇ. : ɂɧɬɟɝɪɚɥ-ɉɪɟɫɫ, 2004. – 240 ɫ.
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ɏɨɞ ɪɚɛɨɬɵ. – ɉɭɫɬɨɣ ɫɬɚɤɚɧɱɢɤ (ɢɥɢ ɤɨɥɛɭ) ɜɡɜɟɲɢɜɚɸɬ ɧɚ ɜɟɫɚɯ, ɦɚɫɫɭ ɡɚɩɢɫɵ- ɜɚɸɬ ɜ ɬɟɬɪɚɞɶ. – Ɉɬɦɟɪɹɸɬ ɦɟɪɧɵɦ ɰɢɥɢɧɞɪɨɦ 50 ɦɥ ɇɋ1 4Ɇ, ɩɟɪɟɥɢɜɚɸɬ ɤɢɫɥɨɬɭ ɋɩɢɫɨɤ ɥɢɬɟɪɚɬɭɪɵ ɜ ɫɬɚɤɚɧ (ɢɥɢ ɤɨɥɛɭ) ɧɚ 100 ɦɥ, ɫɬɚɜɹɬ ɧɚ ɦɚɝɧɢɬɧɭɸ ɦɟɲɚɥɤɭ ɢ ɩɨɝɪɭɠɚɸɬ ɜ ɪɚɫɬɜɨɪ ɞɚɬɱɢɤ ɬɟɦɩɟɪɚɬɭɪɵ. Ɂɚɩɭɫɤɚɸɬ ɩɟɪɟɦɟɲɢɜɚɧɢɟ. ɂɡɦɟɪɹɸɬ ɬɟɦ- 1. ɍɝɚɣ ə.Ⱥ. Ɉɛɳɚɹ ɢ ɧɟɨɪɝɚɧɢɱɟɫɤɚɹ ɯɢɦɢɹ / ə.Ⱥ. ɍɝɚɣ. – Ɇ. : ȼɵɫɲ. ɲɤ., ɩɟɪɚɬɭɪɭ ɢ ɟɟ ɡɧɚɱɟɧɢɟ ɡɚɩɢɫɵɜɚɸɬ (Ɍ1). 2007. – 527 ɫ. – ȼɨ ɜɬɨɪɨɣ ɦɟɪɧɵɣ ɰɢɥɢɧɞɪ ɨɬɛɢɪɚɸɬ 50 ɦɥ NɚɈɇ 4Ɇ ɢ ɜɵɥɢɜɚɸɬ 2. ɋɭɜɨɪɨɜ Ⱥ.ȼ. Ɉɛɳɚɹ ɯɢɦɢɹ / Ⱥ.ȼ. ɋɭɜɨɪɨɜ, Ⱥ.Ȼ. ɇɢɤɨɥɶɫɤɢɣ. – ɋɉɛ. : ɷɬɨɬ ɪɚɫɬɜɨɪ ɜ ɫɬɚɤɚɧ ɫ ɇɋl. ɉɪɨɬɟɤɚɧɢɟ ɪɟɚɤɰɢɢ ɫɨɩɪɨɜɨɠɞɚɟɬɫɹ ɜɵɞɟɥɟ- ɏɢɦɢɡɞɚɬ, 2000. – 622 ɫ. ɧɢɟɦ ɬɟɩɥɨɬɵ, ɬɟɦɩɟɪɚɬɭɪɚ ɪɚɫɬɜɨɪɚ ɪɟɡɤɨ ɩɨɜɵɲɚɟɬɫɹ. Ʉɚɤ ɬɨɥɶɤɨ ɬɟɦɩɟ- 3. ɏɚɭɫɤɪɨɮɬ Ʉ. ɋɨɜɪɟɦɟɧɧɵɣ ɤɭɪɫ ɨɛɳɟɣ ɯɢɦɢɢ: ɜ 2 ɬ. / Ʉ. ɏɚɭɫɤɪɨɮɬ, ɪɚɬɭɪɚ ɫɬɚɛɢɥɢɡɢɪɭɟɬɫɹ (10–15 ɫ), ɟɟ ɡɧɚɱɟɧɢɟ ɡɚɩɢɫɵɜɚɸɬ (Ɍ2). ɗ. Ʉɨɧɫɬɟɛɥ. – Ɇ. : Ɇɢɪ, 2002. – ȼɡɜɟɲɢɜɚɸɬ ɫɬɚɤɚɧ ɫ ɪɚɫɬɜɨɪɨɦ ɩɨɫɥɟ ɪɟɚɤɰɢɢ, ɦɚɫɫɭ ɡɚɩɢɫɵɜɚɸɬ. 4. Ƚɥɢɧɤɚ ɇ.Ʌ. Ɂɚɞɚɱɢ ɢ ɭɩɪɚɠɧɟɧɢɹ ɩɨ ɨɛɳɟɣ ɯɢɦɢɢ : ɭɱɟɛɧɨɟ ɩɨɫɨɛɢɟ Ⱥɧɚɥɨɝɢɱɧɵɟ ɨɩɟɪɚɰɢɢ ɩɨɜɬɨɪɹɸɬ ɫ ɩɚɪɨɣ ɇɋ1—KOH, ɚ ɡɚɬɟɦ ɞɥɹ ɜɭɡɨɜ / ɇ.Ʌ. Ƚɥɢɧɤɚ. – Ɇ. : ɂɧɬɟɝɪɚɥ-ɉɪɟɫɫ, 2004. – 240 ɫ. ɇɋ1—Ʉ2ɋɈ3 (ɜ ɩɨɫɥɟɞɧɟɦ ɫɥɭɱɚɟ ɩɪɢɥɢɜɚɬɶ ɦɟɞɥɟɧɧɨ, ɱɬɨɛɵ ɢɡɛɟɠɚɬɶ ɨɛɪɚɡɨɜɚɧɢɹ ɩɟɧɵ). ɉɨɫɭɞɭ ɢ ɹɤɨɪɶ ɦɚɝɧɢɬɧɨɣ ɦɟɲɚɥɤɢ ɦɟɠɞɭ ɷɤɫɩɟɪɢ- ɦɟɧɬɚɦɢ ɦɨɸɬ ɞɢɫɬɢɥɥɢɪɨɜɚɧɧɨɣ ɜɨɞɨɣ. Ɉɛɪɚɛɨɬɤɚ ɪɟɡɭɥɶɬɚɬɨɜ. Ɍɟɩɥɨɜɨɣ ɷɮɮɟɤɬ ɤɚɠɞɨɣ ɪɟɚɤɰɢɢ (Ⱦɠ/(ɦɨɥɶ)) ɜɵɱɢɫɥɹɸɬ ɩɨ ɮɨɪɦɭɥɟ Q = ǻT· (ɫɪ-ɪɚ· mɪ-ɪɚ + ɫɫɬɟɤɥɚ · mɫɬɚɤɚɧɚ)/ (ɋ1 · V1) , (1) ɝɞɟ ǻT = (Ɍ2 – Ɍ1) – ɢɡɦɟɧɟɧɢɟ ɬɟɦɩɟɪɚɬɭɪɵ ɪɚɫɬɜɨɪɚ; C1 – ɦɨɥɹɪɧɚɹ ɤɨɧɰɟɧɬɪɚɰɢɹ (ɜ ɦɨɥɶ/ɥ) ɪɚɫɬɜɨɪɚ ɜɟɳɟɫɬɜɚ, ɩɟɪɟɞ ɤɨ- ɬɨɪɵɦ ɜ ɭɪɚɜɧɟɧɢɢ ɫɬɨɢɬ ɫɬɟɯɢɨɦɟɬɪɢɱɟɫɤɢɣ ɤɨɷɮɮɢɰɢɟɧɬ 1; V1 – ɢɫɯɨɞɧɵɣ ɨɛɴɟɦ ɷɬɨɝɨ ɠɟ ɪɚɫɬɜɨɪɚ (ɥ); ɫɪ-ɪɚ – ɭɞɟɥɶɧɚɹ ɬɟɩɥɨɟɦɤɨɫɬɶ ɩɨɥɭɱɢɜɲɟɝɨɫɹ ɪɚɫɬɜɨɪɚ (ɩɪɢɧɹɬɶ ɩɪɢɦɟɪɧɨ ɪɚɜɧɨɣ ɭɞɟɥɶɧɨɣ ɬɟɩɥɨɟɦɤɨɫɬɢ ɜɨɞɵ 4,18 Ⱦɠ/ɝ·Ʉ); mɪ-ɪɚ – ɢɬɨɝɨɜɚɹ ɦɚɫɫɚ ɪɚɫɬɜɨɪɚ (ɝ); ɫɫɬɟɤɥɚ – ɭɞɟɥɶɧɚɹ ɬɟɩɥɨɟɦɤɨɫɬɶ ɫɬɟɤɥɚ, ɢɡ ɤɨɬɨɪɨɝɨ ɢɡɝɨɬɨɜɥɟɧ ɫɬɚɤɚɧ; mɫɬɚɤɚɧɚ – ɦɚɫɫɚ ɩɭɫɬɨɝɨ ɫɬɚɤɚɧɚ (ɝ). ɂɬɨɝɨɜɚɹ ɦɚɫɫɚ ɪɚɫɬɜɨɪɚ (mɪ-ɪɚ) ɜɵɱɢɫɥɹɟɬɫɹ ɤɚɤ ɪɚɡɧɨɫɬɶ ɦɚɫɫ ɫɬɚ- ɤɚɧɚ ɫ ɪɚɫɬɜɨɪɨɦ ɩɨ ɨɤɨɧɱɚɧɢɢ ɨɩɵɬɚ ɢ ɩɭɫɬɨɝɨ ɫɬɚɤɚɧɚ. ɍɞɟɥɶɧɚɹ ɬɟɩɥɨ- ɟɦɤɨɫɬɶ ɫɬɟɤɥɚ ɦɚɪɤɢ «ɩɢɪɟɤɫ», ɢɡ ɤɨɬɨɪɨɝɨ ɨɛɵɱɧɨ ɢɡɝɨɬɚɜɥɢɜɚɸɬ ɯɢɦɢ- ɱɟɫɤɭɸ ɩɨɫɭɞɭ, ɫɨɫɬɚɜɥɹɟɬ 0,859 Ⱦɠ/ (ɝ·Ʉ) (ɩɪɢ Ɍ= 273–573 Ʉ). Ɂɚɩɢɲɢɬɟ ɬɟɪɦɨɯɢɦɢɱɟɫɤɢɟ ɭɪɚɜɧɟɧɢɹ ɩɪɨɞɟɥɚɧɧɵɯ ɪɟɚɤɰɢɣ. Ʉɨɧɬɪɨɥɶɧɵɟ ɜɨɩɪɨɫɵ. 1. Ʉɚɤ ɢɡɦɟɧɢɬɫɹ ɮɨɪɦɭɥɚ ɞɥɹ ɪɚɫɱɟɬɚ ɬɟɩɥɨɜɨɝɨ ɷɮɮɟɤɬɚ, ɟɫɥɢ ɜ ɧɟɟ ɩɨɞɫɬɚɜɢɬɶ ɤɨɧɰɟɧɬɪɚɰɢɸ ɜɟɳɟɫɬɜɚ, ɩɟɪɟɞ ɤɨɬɨɪɵɦ ɫɬɨɢɬ ɫɬɟɯɢɨɦɟɬɪɢɱɟ- ɫɤɢɣ ɤɨɷɮɮɢɰɢɟɧɬ n? 2. Ʉɚɤ ɨɛɴɹɫɧɢɬɶ ɨɞɢɧɚɤɨɜɵɣ ɬɟɩɥɨɜɨɣ ɷɮɮɟɤɬ ɪɟɚɤɰɢɣ 1 ɢ 2? 3. ɑɟɦ ɨɛɭɫɥɨɜɥɟɧɵ ɨɬɤɥɨɧɟɧɢɹ ɩɨɥɭɱɟɧɧɨɝɨ ɡɧɚɱɟɧɢɹ ɬɟɩɥɨɜɨɝɨ ɷɮɮɟɤɬɚ ɪɟɚɤɰɢɢ ɨɬ ɢɫɬɢɧɧɨɝɨ? 4. Ʉɚɤɢɟ ɢɡɦɟɧɟɧɢɹ ɧɭɠɧɨ ɜɧɟɫɬɢ ɜ ɦɟɬɨɞɢɤɭ ɢɡɦɟɪɟɧɢɣ ɢ ɪɚɫɱɟɬɨɜ, ɱɬɨɛɵ ɩɨɜɵɫɢɬɶ ɩɪɚɜɢɥɶɧɨɫɬɶ ɩɨɥɭɱɟɧɧɨɝɨ ɪɟɡɭɥɶɬɚɬɚ? 25 26