Solutions and Concentrations Quiz

What is the first step in calculating the grams of solute needed for a solution?

• Determine the volume of the solution.

• Calculate the molarity of the solution.

• Find the molar mass of the solute.

• Measure the temperature of the solution.

What is the final step in calculating the grams of solute needed for a solution?

• Measure the temperature of the solution.

• Calculate the molarity of the solution.

• Multiply molarity, volume, and molar mass.

• Determine the volume of the solution.

What is the concentration of a solution expressed as in molality?

• Moles of solute per liter of solution

• Moles of solute per kg of solvent

• Grams of solute per liter of solution

• Grams of solute per kg of solvent

What is the concentration of a solution expressed as in terms of molarity?

• Moles of solute per liter of solution

• Moles of solute per kg of solvent

• Grams of solute per liter of solution

• Grams of solute per kg of solvent

How many grams of KCl should be added to 750.0 g of water to prepare a 0.500 m solution?

• 28.0 g

• 37.3 g

• 18.7 g

• 25.0 g

What does 25% NaCl (w/v) mean?

• 25g NaCl for every 1 L solution

• 25g NaCl for every 100mL solution

• 25mL NaCl for every 1000mL solution

• 25 moles NaCl for every 100mL solution

Tags

NGSS.HS-PS1-5

If the mass of solute is 200 g and the mass of solution is 800 g, what is the % w/w?

• 20%

• 25%

• 30%

• 35%

In the dilution equation C₁V₁ = C₂V₂, what does C₁ represent?

• Desired concentration

• Original concentration

• Desired volume

• Original volume

Why is it important to use appropriate units in the dilution equation?

• To make the solution taste better

• To ensure the equation works correctly

• To change the color of the solution

• To increase the volume

What is the main concept of dilution?

• Increasing concentration

• Decreasing concentration

• Increasing temperature

• Decreasing temperature

Tags

NGSS.HS-PS1-5