Molarity of the HCl concentration

You have made it to Dr. Muchmerry’s lab hoping to     discuss how the conference went, but she is not there. You’ve once again found     a note on the lab bench with a request.

Good Afternoon,

Thank you for your work helping     me to prepare for the conference, it went great. Since I have been back, I     have been working on a post for the school’s Facebook page. Herzing has     asked us to share an interesting piece of information that relates to     chemistry. So, I’ve decided to write a post about acids and bases.

– Dr. Ima

Name:

Date:

 

This week in your chemistry class, you have been introduced to the process of titration. Remember that titration is the process used to determine the unknown concentration of a solution by using the known concentration of another solution. This process uses a buret to measure the volume of titrant that is added to the analyte. Below is a set of measurements that I would like you to solve:

How to read a buret:

https://www.youtube.com/watch?v=Asg55fFt4zk

Suppose you titrated a sample of NaOH with 0.150 M of HCl. Your starting volume on the burette is 0.00 mL. This is your final reading. How much NaOH was dispensed from the buret?

 

Answer:

Suppose you titrated a sample of NaOH with 0.150 M of HCl. Your starting volume on the burette is 0.00 mL. This is your final reading. How much NaOH was dispensed from the buret?

 

Answer:

Well done!

Now we need to solve for an unknown.

For your review, I have included a link to a video for you to review titration and how to solve for an unknown. https://www.youtube.com/watch?v=d1XTOsnNlgg

Using the information I’ve provided, calculate the molarity of the HCl concentration using the information provided.

Here’s the reaction:

HCl + NaOH —-> H2O + NaCl

Volume of HCl: 20.0 mL

Concentration of HCl: UNKNOWN

Know concentration of NaOH: 0.100 M

Titrate end point or total of NaOH volume dispensed: 48.6mL

Answer:

From the above information, would you put the HCl solution in the buret or in the Erlenmeyer flask in this titration reaction?

Answer:

Would you add the indicator, in this case we would use Phenolphthalein, to the HCl or NaOH?

Answer:

Calculate the molarity of the HCl concentration using the information provided.

Here is the reaction:

HCl + NaOH —-> H2O + NaCl

Volume of HCl: 10.0 mL

Concentration of HCl: UNKNOWN

Concentration of NaOH: 0.100 M

Volume of NaOH dispensed to reach endpoint 12.00 mL

Answer: