A solute is any substance that is dissolved in another substance, which is called the solvent. A student tested the solubility (a measure of how much solute will dissolve into the solvent) of six different substances. The solubility of a substance at a given temperature is defined as the concentration of the dissolved solute that is in equilibrium with the solvent. Table 1 represents the concentration of dissolved substances in 100 grams of water at various temperatures. The concentrations are expressed in grams of solute per 100 grams of water. According to table 1, HCl would most likely have what concentration at 70 degree C?

Correct answer: D. 51.5 g/100g H2O

A. 25.5 g/100g H2O
B. 37.0 g/100g H2O
C. 48.5 g/100g H2O
D. 51.5 g/100g H2O

Explanation

The best answer is d. According to Table 1, HCl has a concentration of 55 g/100 g H2O at 60◦C, and a concentration of 48 g/100 g H2O at 80◦C. Therefore, at 70◦C it would likely have a concentration of 55 + 48 ÷ 2 = 51.5 g/100 g H2O.

Last updated 3 September 2026

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