Solubility Calculations

50 cm³ of a saturated solution of potassium trioxonitrtae (V) at 40°C contained 5.05g of the salt. What is the solubility of potassium trioxonitrate (V) at 40°C? (KNO₃ = 101g/mol]

• 0.5 mo/dm³

• 1.0 mo/dm³

• 1.5 mo/dm³

• 2.0 mo/dm³

1. If the solubility of KHCO₃ is 0.40 mol/dm³ at room temperature, calculate the mass of KHCO₃ in 100 cm³ of the solution at this temperature [KHCO₃ = 100g/mol]

• 10 grams

• 6 grams

• 4 grams

• 2 grams

If 12.2g of Pb(NO)2 were dissolved in 21g of distilled water at $20\degree C,$  calculate the solubility of the solute in $gcm^{-3}$  

• 58.01 $gcm^{-3}$  

• 5.81 $gcm^{-3}$  

• 0.581 $gcm^{-3}$  

• 580.95 $gcm^{-3}$  

On heating 25g of a saturated solution to dryness at 60°C, 4g of anhydrous salt was recovered. Calculate its solubility in grammes per 100g of solvent

• 25 g/100

• 19.05 g/100

• 40 g/100

• 38.1 g/100