Respuesta :
By looking at the graph, you can determine the answer is C. Na2HAsO4 and Na2SO4.
Answer:
Option C) Na2SO4 and Na2HAsO4
Explanation:
The solubility of salts can be affected by many things (pH, temperature, etc), this is why when comparing the solubility of two or more salts it's important to establish the conditions.
In this case the graph was made for changes in Temperature, so the first thing is to identify the T=40°C and then, which curves cross at that point.
As can be seen, the red curve (Na2HAsO4) and the blue curve (Na2SO4 ) cross at 40°C indicating that those compounds have similar solubilities at that temperature.