Multiple Choice
Which answer best describes why ice floats in liquid water?
1. Intro to General Chemistry
Density
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Which of the following solutions would you expect to have the greatest molarity?
A
1 mole of NaCl dissolved in 2 liters of water
B
0.5 moles of NaCl dissolved in 1 liter of water
C
1 mole of NaCl dissolved in 1 liter of water
D
0.5 moles of NaCl dissolved in 0.5 liters of water
Verified step by step guidance1
Understand that molarity (M) is defined as the number of moles of solute divided by the volume of solution in liters. The formula is: M = \( \frac{\text{moles of solute}}{\text{liters of solution}} \).
Calculate the molarity for each solution option. Start with the first option: 1 mole of NaCl dissolved in 2 liters of water. Use the formula: M = \( \frac{1 \text{ mole}}{2 \text{ liters}} \).
Next, calculate the molarity for the second option: 0.5 moles of NaCl dissolved in 1 liter of water. Use the formula: M = \( \frac{0.5 \text{ moles}}{1 \text{ liter}} \).
For the third option, calculate the molarity: 1 mole of NaCl dissolved in 1 liter of water. Use the formula: M = \( \frac{1 \text{ mole}}{1 \text{ liter}} \).
Finally, calculate the molarity for the fourth option: 0.5 moles of NaCl dissolved in 0.5 liters of water. Use the formula: M = \( \frac{0.5 \text{ moles}}{0.5 \text{ liters}} \). Compare the calculated molarities to determine which solution has the greatest molarity.
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