Exploring Dilution and Concentration in Chemistry

What is the primary purpose of dilution?

• To decrease the number of moles of solute

• To increase the number of moles of solute

• To change the chemical composition of the solute

• To lower the concentration by adding more solvent

In the context of dilution, what typically remains unchanged?

• The temperature of the solution

• The volume of the solvent

• The concentration of the solution

• The number of moles of solute

What analogy is used to explain the concept of dilution?

• Moles climbing a mountain

• Moles swimming in a pool

• Moles running on a treadmill

• Moles on a boat being dumped into a bathtub

What does the product of molarity and volume represent?

• The total volume of the solution

• The number of moles of solute

• The temperature of the solution

• The concentration of the solvent

What is the key equation used in dilution calculations?

• a^2 + b^2 = c^2

• E = mc^2

• PV = nRT

• M1V1 = M2V2

In the example problem, what is the initial volume of the phosphoric acid solution?

• 1300 milliliters

• 500 milliliters

• 300 milliliters

• 1000 milliliters

What is the final volume of the solution after dilution in the example problem?

• 500 milliliters

• 1300 milliliters

• 300 milliliters

• 1000 milliliters

What is the new molarity of the solution after dilution in the example problem?

• 5 moles per liter

• 1.15 moles per liter

• 0.5 moles per liter

• 2.5 moles per liter

Why is it sometimes unnecessary to convert milliliters to liters in dilution calculations?

• Because it simplifies the equation

• Because milliliters are more accurate

• Because the units cancel out

• Because liters are not used in chemistry

What is a practical application of the dilution equation in the laboratory?

• Calculating the pH of a solution

• Measuring temperature

• Creating solutions with specific concentrations

• Determining the mass of a solute