Preparation of Potassium Carbonate Solution

How can we prepare a solution of potassium carbonate?

What volume of 0.340 M solution can be prepared from 15.6 g of potassium carbonate?

What is the formula to calculate the volume of the solution?

Answer:

There are specific steps to prepare a solution of potassium carbonate from a given mass. The volume of the 0.340 M solution that can be prepared from 15.6 g of potassium carbonate is approximately 0.3318 liters.

Introduction: Potassium carbonate is a commonly used chemical compound with various applications in industries and laboratories. One of the common tasks in chemistry involves preparing a solution with a specific concentration from a given mass of a solute.

Steps to prepare the solution:

1. Weigh 15.6 grams of potassium carbonate accurately using a digital balance.
2. Calculate the number of moles of potassium carbonate using its molar mass.
3. Determine the concentration of the desired solution (0.340 M in this case).
4. Use the formula volume = moles / concentration to calculate the volume of the solution.
5. Prepare the solution by dissolving the calculated amount of potassium carbonate in the required volume of solvent (usually water).

Formula to calculate the volume of the solution: volume (in liters) = mass (in grams) / molar mass (in grams per mole) / concentration (in moles per liter)

Explanation: To prepare the 0.340 M solution of potassium carbonate:

1. Calculate moles of potassium carbonate: 15.6 grams / 138.21 g/mol = 0.1127 mol
2. Calculate volume of solution: 0.1127 mol / 0.340 mol/L = 0.3318 liters

Conclusion: By following the steps and using the formula mentioned above, we can successfully prepare a potassium carbonate solution with the desired concentration from a given mass. Understanding these concepts in chemistry allows us to perform various experiments and reactions effectively.