Chemistry - Ionic Equilibrium Question with Solution | TestHub
List - I (Mixture in solution) | List - II (Volume of 1 M HCl used) |
|---|---|
(P) 4 g NaOH + 8.4 g NaHCO3 | (1) At phenolphthalein end point = 50 ml |
(Q) 2 g NaOH + 5.3 g Na2CO3 | (2) At methyl orange end point after phenolphthalein end point = 50 ml |
(R) 10.6 g Ba2CO3 | (3) At phenolphthalein end point = 100 ml |
(S) 5.3 g Na2CO3 + 4.2 g NaHCO3 | (4) At methyl orange end point after phenolphthalein end point = 100 ml |
| (5) At methyl orange end point = 100 ml (no phenolphthalein colour change) |
Options:
Answer:
Solution:
P 3: Phenolphthalein (Ph) estimates complete NaOH (0.1 mol); thus, .
Q 2: Methyl orange (MeO) after Ph estimates NaHCO₃ produced from Na₂CO₃ (0.05 mol); thus, .
R 4: For 0.1 mol Na₂CO₃, the volume needed to convert it from NaHCO₃ to CO₂ (after Ph) is .
S 1: Ph estimates half of Na₂CO₃ (0.05 mol) converting to NaHCO₃; thus, .
