Molarity and Dilution Calculations

Front

What is molarity?

Back

Molarity (M) is a measure of concentration defined as the number of moles of solute per liter of solution.

Front

How do you calculate molarity?

Back

Molarity is calculated using the formula: M = moles of solute / liters of solution.

Front

What is the formula to find the number of moles from grams?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the molar mass of NaCl?

Back

The molar mass of NaCl (sodium chloride) is approximately 58.44 g/mol.

Front

How does dilution affect molarity?

Back

Dilution decreases the molarity of a solution as more solvent is added, increasing the total volume.

Front

What is the dilution formula?

Back

The dilution formula is: C1V1 = C2V2, where C is concentration and V is volume.

Front

If you dilute a solution, what happens to the number of moles of solute?

Back

The number of moles of solute remains constant during dilution.

Front

How do you prepare a diluted solution from a concentrated stock solution?

Back

To prepare a diluted solution, measure a specific volume of the stock solution and add enough solvent to reach the desired final volume.

Front

What is the final concentration if you add water to a solution?

Back

The final concentration can be calculated using the dilution formula, taking into account the initial concentration and the total volume after adding water.

Front

What is the concentration of a solution after adding 60 mL of water to 40 mL of 0.75 M NaBr?

Back

The concentration becomes 0.30 M after dilution.