Practice question

Given: The K_{sp of NiCO₃ is 1.3 × 10⁻⁷. What is its solubility in water? These values define the system as per NCERT data. Formula: NiCO₃(s) <=> Ni²+ + CO₃²-, K_{sp = S². This is the standard NCERT relation for this phenomenon. Substitution & Calculation: S² = 1.3 × 10⁻⁷, S = sqrt1.3 × 10⁻⁷ approx 3.61 × 10⁻⁴ M. Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.