Question

A chemistry student weighs out 13.0 g of an unknown solid compound X and adds it to 100. mL of distilled water at 29.° C. After 10 minutes of stirring, all of the X has dissolved. Just to be sure, the student adds a further 4. mg of X to the solution, and it, too, dissolves. Using only the information above, can you calculate the solubility of X in water at 29.° C ?
a. yes
b. no
If you said yes, calculate it. Be sure your answer has a unit symbol and the right number of significant digits.

Answer 1

Answer:

b

Explanation:

to find the solubility we have to the amount of substance in g when added to water that doesnt dissolve further

Answer 2

Answer:

b. no

Explanation:

The solubility is the maximum amount of a solute that can be dissolved in 100 mL of solvent. In this experiment, first 13.0 g of solute are dissolved. Then, 4 mg more of solute are dissolved. So far, we know that we can dissolve 13.004 g of solute in 100 mL of water. However, we don't know if this is the maximum amount we could dissolve. To find the solubility, we should add more solute until reaching the point when no more solute is dissolved.