Question

(Solutions & Precipitate help, not sure how to do these)

10) A saturated solution of KClO3 is formed from one hundred grams of water. If the saturated solution is cooled from 90°C to 50°C, how many grams of
precipitate are formed?

11) A saturated solution of NH4Cl is formed from one hundred grams of water. If the saturated solution is cooled from 80°C to 40°C, how many grams of precipitate are formed?

Answer 1

from the graph,
Q10)
at 90degrees, amount of KClO3 solute = 50g (approx)
at 50degrees, amount of KClO3 solute = 20g (approx)

amount precipitated = 50-20 = 30g

Answer 2

Q11)
at 80degrees, amount of NH4Cl solute = 65g (approx)
at 40degrees, amount of NH4Cl solute = 45g (approx)

amount precipitated = 65-45 = 20g

Answer 3

hard

Answer 4

Thanks so much! @electrokid I appreciate it!