how do I prepare 10% HCL from 50% HCL solution
one part 50% HCl to four parts H₂O
To prepare a 10% HCl solution from a 50% HCl solution, you need to dilute the 50% solution by adding a calculated amount of distilled water. Here's the step-by-step process:
Step 1: Determine the amount of the 50% HCl solution needed.
Decide how much 10% HCl solution you want to make. Let's say you want to prepare 500 mL of a 10% HCl solution.
Step 2: Calculate the amount of concentrated HCl required.
Since the 50% HCl solution is five times more concentrated than the desired 10% solution, you need to use one-fifth (1/5) of the volume of the 10% solution. Thus, for 500 mL of 10% solution, you'll use 500 mL / 5 = 100 mL of the 50% HCl solution.
Step 3: Measure the concentrated HCl.
Using a graduated cylinder or a pipette, measure 100 mL of the 50% HCl solution.
Step 4: Add distilled water.
Pour the 100 mL of 50% HCl solution into a clean and dry container, like a beaker or a volumetric flask. Then, using a graduated cylinder or a pipette, add distilled water to make up the remaining volume. In our example, add 400 mL of distilled water to the beaker to reach a total volume of 500 mL.
Step 5: Mix thoroughly.
Carefully mix the contents of the beaker by stirring or swirling until the solution is homogeneously mixed. Ensure that the diluted HCl solution is properly labeled.
And that's it! You have successfully prepared a 10% HCl solution from the 50% HCl solution. Remember to follow the necessary safety precautions when working with acid solutions.