12 g of solid protassium chlorate (KCIO) were added to 40 g of water and heated to dissolve all the solid. As the solution cools, crystals of potassium chlorate at 66 oC. The solubility of potassium chlorate at 66 oC is therefore
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Correct Answer: Option E
Explanation:
To find the solubility of potassium chlorate (KClO₃) at 66°C, we use the definition of solubility:
> Solubility is the number of grams of solute that can dissolve in 100 g of water at a specific temperature.
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Given:
- 12 g of KClO₃ dissolves in 40 g of water at 66°C.
We want to find how many grams would dissolve in 100 g of water at that same temperature:
\[
\text{Solubility} = \frac{12 \text{ g}}{40 \text{ g water}} \times 100 = 30 \text{ g/100 g water}
\]
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Correct Answer: E. 30
To find the solubility of potassium chlorate (KClO₃) at 66°C, we use the definition of solubility:
> Solubility is the number of grams of solute that can dissolve in 100 g of water at a specific temperature.
---
Given:
- 12 g of KClO₃ dissolves in 40 g of water at 66°C.
We want to find how many grams would dissolve in 100 g of water at that same temperature:
\[
\text{Solubility} = \frac{12 \text{ g}}{40 \text{ g water}} \times 100 = 30 \text{ g/100 g water}
\]
---
Correct Answer: E. 30