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JEE Mains · Chemistry · STD 11 - 6.2. Equilibrium - II (icon Equilibrium)

यदि लेक्टिक अम्ल का \(\mathrm{pKa}, 5\) है तो \(25^{\circ} \mathrm{C}\) पर \(0.005 \mathrm{M}\) केल्शियम लेक्टेट विलयन की \(\mathrm{pH}\) \(\times 10^{-1}\) है। (निकटतम पूर्णाक)

  1. A \(85\)
  2. B \(84\)
  3. C \(83\)
  4. D \(82\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(85\)

Step-by-step Solution

Detailed explanation

Concentration of calcium lactate \(=0.005\,M ,:\) concentration of lactate ion \(=(2 \times 0.005)\,M\). Calcium lactate is a salt of weak acid \(+\) strong base \(\therefore\) Salt hydrolysis will take place. \(pH =7+\frac{1}{2}( pKa +\log C )\)…
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