Concept explainers
Interpretation:
The solubility of potassium bromide (KBr) and potassium nitrate (KNO3) at 80°C needs to be described.
Concept introduction:
Solubility: Solubility can be expressed as maximum amount of solute that can dissolve in known amount of solvent at a given temperature and pressure.
Effect of temperature on solubility: Solubility is affected by increasing the temperature of the solvent as the kinetic energy of its particles is increased, thus more-frequent collisions occur. This is why many substances are more soluble at high temperatures.
Answer to Problem 91A
From the graph:
It can be seen that the solubility of potassium nitrate is nearly double to the solubility of potassium bromide at 80°C.
Explanation of Solution
From the graph,
The values of the solubility at different temperature can be obtained. At 80°C, the solubility of KBr is almost 95 g in 100 g H2O whereas the solubility of KNO3 is nearly 170 g in 100 g H2O which is nearly twice as high as the solubility of KBr.
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Glencoe Chemistry: Matter and Change, Student Edition
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