I need help with this chemistry question PLEASE!?

Suppose that you have made a saturated solution of this solute using 56.0 g of water at 20.0 °C. How much more solute can you add if the temperature is increased to 30.0 °C?

Temperature (C°)

20°

30°

Solubility (g/100 g H2O)

37.4

71.5

1 Answer

  • At 20°C you can dissolve 37.4g in 100g water

    This is 56/100*37.4 = 20.9g in 56g water

    At 30°C you can dissolve 71.5g in 100g water

    This is 56/100*71.5 = 40.0g in 56g water

    Therefore by increasing the temperature from 20°C to 30°C you can add a further 40.0 – 20.9 = 19.1g extra solute.

Leave a Comment