Xlorid kislotaning 200 ml 3 M li eritmasiga 100 ml suv va 4 g qattiq natriy ishqori solindi. Hosil bo'lgan eritmaning pH qiymatini aniqlang.

  1. -0,22
  2. 0,22
  3. 0,3
  4. -0,3

📝 Detailed explanation

HCl mollari: 0,2 L × 3 mol/L = 0,6 mol
NaOH mollari: 4/40 = 0,1 mol
Reaksiya: HCl + NaOH → NaCl + H₂O
Qolgan HCl: 0,6 - 0,1 = 0,5 mol
Umumiy hajm: 200 + 100 = 300 ml = 0,3 L
[H⁺] = 0,5/0,3 = 5/3 ≈ 1,667 M
pH = -lg(5/3) = -(lg5 - lg3) = -(0,699 - 0,477) = -0,222 ≈ -0,22.
22 / 36 (61%)
Question 22 of 36
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