Question

HELP PLEASE. 20 POINTS AND BRAINLIEST!!!! Solubility of salts in water is temperature dependent. Consider the solubility curve of the salts seen here. Which salt's solubility changed the least from 0 - 100oC; which salt's solubility changed the greatest amount from 0 - 100oC?

Answer 1

Answer: Sodium chloride's solubility has changed the least from  $0^0C-100^0C$ and potassium nitrate's solubility has changed the most from $0^0C-100^0C$.

Explanation:

Solubility in a particular liquid is the amount of solute that can dissolve in unit volume of the liquid to form the saturated solution at the given temperature and under a pressure of 1 atmosphere.

a) Solubility of Potassium iodide at $0^0C$: 129g/100 ml

Solubility of Potassium iodide at $100^0C$: 250g/10ml

Change in solubility of Potassium iodide = $(250-129)^0C=121^0C$

b) Solubility of sodium nitrate at $0^0C$: 70g/100 ml

Solubility of sodium nitrate at $100^0C$: 180 g/100 ml

Change in solubility of sodium nitrate  = $(180-70)^0C=110^0C$

c) Solubility of Potassium nitrate at $0^0C$: 12g/100 ml

Solubility of Potassium nitrate at $100^0C$: 235g/100 ml

Change in solubility of Potassium nitrate = $(235-12)^0C=223^0C$

d) Solubility of sodium chloride at $0^0C$: 36g/100 ml

Solubility of sodium chloride at $100^0C$: 40 g/100 ml

Change in solubility of sodium chloride= $(40-36)^0C=4^0C$

e) Solubility of Potassium chlorate at $0^0C$: 5g/100 ml

Solubility of Potassium chlorate at $100^0C$: 60 g/100 ml

Change in solubility of Potassium chlorate = $(60-5)^0C=55^0C$

Thus we can see that sodium chloride's solubility has changed the least from  $0^0C-100^0C$ and potassium nitrate's solubility has changed the most from $0^0C-100^0C$.

Answer 2

Sodium chloride's solubility only changed about 5 g/100 mL water, whereas potassium nitrate's solubility changed about 230 g/100 mL water