Multiple Choice
Which of the following correctly describes the dissolution of potassium sulfide (K2S) in water?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
Multiple Choice
According to solubility data, how many grams of KNO3 can dissolve in 50 g of water at 10 °C?
A
Approximately 8.0 g
B
Approximately 16.0 g
C
Approximately 3.0 g
D
Approximately 32.0 g
Verified step by step guidance1
Identify the solubility of KNO\_3 at 10 °C from the solubility data, which is typically given in grams of KNO\_3 per 100 grams of water. For example, if the solubility is 6.0 g per 100 g of water, this means 6.0 g of KNO\_3 can dissolve in 100 g of water at 10 °C.
Set up a proportion to find out how many grams of KNO\_3 can dissolve in 50 g of water. Use the formula: \(\frac{\text{grams of KNO}_3}{\text{grams of water}} = \frac{\text{solubility at 10 °C}}{100}\).
Plug in the known values into the proportion: \(\frac{x}{50} = \frac{\text{solubility at 10 °C}}{100}\), where \(x\) is the grams of KNO\_3 that can dissolve in 50 g of water.
Solve for \(x\) by multiplying both sides by 50: \(x = 50 \times \frac{\text{solubility at 10 °C}}{100}\).
Interpret the result to determine the approximate grams of KNO\_3 that can dissolve in 50 g of water at 10 °C, and compare it to the given options to select the correct answer.
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