Given the following experimental procedure below: 1) What is the original concentration HCl and volume HCl used in dilution 2)Concentration of diluted HCl solution ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 1. Obtain 60 mL of 0.1 M HCl, hydrochloric acid solution. 2. Using a clean, dry graduated cylinder, transfer 50 ml of this solution into a clean 100 or 150 mL beaker. Label the beaker with the concentration of the acid. 3. Pipette 5 mL of the remaining acid solution into a clean 50 or 100 mL graduated cylinder. The graduated cylinder only needs to be rinsed with distilled water. 4. Dilute the 5 mL of HCl to 50 mL with distilled water in the graduated cylinder. 5. This solution can now be transferred into a second clean 100 or 150 mL beaker and mixed thoroughly. Label the beaker with the new concentration of this acid solution. 6. Measure the pH of each of the two hydrochloric acid solutions with a pH meter. Make sure to rinse the pH electrode with distilled water between readings. Record each pH value. 7. Transfer these two solutions into a 600 mL waste beaker which will be taken care of at the end of the experiment and clean out the small beakers.
Given the following experimental procedure below: 1) What is the original concentration HCl and volume HCl used in dilution 2)Concentration of diluted HCl solution ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 1. Obtain 60 mL of 0.1 M HCl, hydrochloric acid solution. 2. Using a clean, dry graduated cylinder, transfer 50 ml of this solution into a clean 100 or 150 mL beaker. Label the beaker with the concentration of the acid. 3. Pipette 5 mL of the remaining acid solution into a clean 50 or 100 mL graduated cylinder. The graduated cylinder only needs to be rinsed with distilled water. 4. Dilute the 5 mL of HCl to 50 mL with distilled water in the graduated cylinder. 5. This solution can now be transferred into a second clean 100 or 150 mL beaker and mixed thoroughly. Label the beaker with the new concentration of this acid solution. 6. Measure the pH of each of the two hydrochloric acid solutions with a pH meter. Make sure to rinse the pH electrode with distilled water between readings. Record each pH value. 7. Transfer these two solutions into a 600 mL waste beaker which will be taken care of at the end of the experiment and clean out the small beakers.
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