pH Scale Lab (with project)

Materials (put in lab book)

• Read the procedure below and list all of the materials required to complete this part of the lab. Do not forget to include chemicals and glassware.

Procedure (DO NOT copy, take your Chromebook with you and follow the directions)

• 1. Fill a spot on the spot plate with each of the 5 solutions we are testing: strong acid, strong base, weak acid, weak base, and neutral. (You may write on the white paper)

  2. Using the pH paper, determine the pH value of each solution and record in data table.

  3. Copy the number line from 0-14 and plot those five solutions on that scale. Make sure you label the points.

Tips (read these please!):

• Dip the pH paper in the solution and remove immediately, do not leave them in.

• Wait about 10 seconds then match the color of the paper to the value.

• Use the paper that is under the spot plate to place used pH strips on. At the end, fold up the paper with the strips and throw it all away at once.

Clean up:

• Dump solutions down the drain with running water and rinse the spot plate.

• Fold up the paper with the pH strips and throw it away. Replace it with a new, clean paper.

Data (put into lab book)

Click here if you're absent to see pictures from lab.

Part 2: pH of Household Products

Procedure (DO NOT copy, take your Chromebook with you and follow the directions)

• 1. MAKE SURE YOU HAVE FILLED IN THE GUESS COLUMN OF YOUR DATA TABLE. (Get teacher's initials before continuing)

  2. Dip a strip of pH paper into a household product to determine the pH and record it in the data table.

1. Based on what you learned in part 1, determine if that substance is an acid or a base and record it in that column.

4. Repeat for the other 9 household products.

Data (put into lab book)

Click here if you're absent to see pictures from lab. Be sure to fill out the guess column before clicking to see the pictures from lab.

Conclusion (answer in your lab book)

• 1. List all of the acidic household products in order from strongest to weakest.

  2. What do all of the acidic items have in common?

  3. List any neutral items.

  4. List all of the basic household products in order from strongest to weakest.

5. What do all of the basic items have in common?

Each individual student must complete the following:

On a separate piece of paper, you must create a scale from 0-14 showing where acids, neutral, and bases fall.

Then plot all 10 household products along the scale.

Be creative! Do not do a typical number line, rather use anything that you could scale from 0-14.

Neatness, color, and creativity counts! Do not forget to give it a title.