What is the largest amount of blue copper sulphate that could be dissolved in 500 g of water at 20oC.
Answers
Answer:
Explanation:If a substance is soluble it will dissolve in a given amount of liquid (called the ‘solvent’).
Different substances have different solubilities. This table shows the solubility of substances in water at 20°C. Solubility is shown as the grams of a solute per 100 g of water.
Solute Solubility
Sodium chloride 36
Copper(II) sulfate 32
Sodium hydrogencarbonate 10
Lead(II) iodide 0.07
Lead(II) nitrate 54
The effect of temperature
In general, solids become more soluble as the temperature increases. This is why sugar dissolves better in hot water than in cold water. The table shows three examples of the solubility (g of solute per 100 g water) of substances at different temperatures.
20°C 30°C 40°C
Sodium chloride 35.9 36.1 36.4
Copper(II) sulfate 32.0 37.8 44.6
Potassium nitrate 47.0 61.6 77.0