Solubility of sodium chloride in 100 g of water at 273 K is — s Block Elements Chemistry Question

💡 Solution & Explanation

I need to see the options to provide a complete answer, but I can explain the standard solubility of NaCl at 273 K. **Step-by-step solution:** 1. **Reference data**: At 273 K (0°C), sodium chloride has a solubility of approximately **35.7 g per 100 g of water**. 2. **Why this value?**: NaCl solubility varies slightly with temperature. At 273 K, the ionic interactions in the lattice and hydration energy reach an equilibrium that allows this specific amount to dissolve. 3. **Temperature consideration**: Unlike many salts, NaCl shows minimal temperature dependence—its solubility remains nearly constant from 0°C to 100°C (around 35.7–39 g/100 g water). 4. **Saturation point**: At 273 K, dissolving **~35.7 g NaCl in 100 g water** produces a saturated solution where no more solute can dissolve under equilibrium conditions. **Without seeing option B explicitly**, if it states approximately **35.7 g, 36 g, or 35.5 g per 100 g water**, that would be correct. If you can provide the options, I can confirm which numerical answer choice (B) corresponds to this value and explain why alternatives are incorrect.