Properties Of Acids And Bases (Lab) (Page 2 of 4) in pdf

Acids/Bases 2

Materials

Acetic Acid (0.1 M)

HCl (0.1 M)

Red Litmus Paper

Ammonia (0.1 M)

Magnesium

Stirring Rod

Blue Litmus Paper

NaOH (0.1 M)

Universal Indicator

Conductivitiy Tester

pH paper

Well Plate

Distilled Water

Phenolphthalein

Procedure

Part A – Classifying Acids and Bases

1. Sketch a well plate on a piece of white paper. Label the rows A-D and the columns both

1-5 and HCl, HC

, H

O, NH

, and NaOH.

2. Add 5 drops of the respective solutions in Rows A-C.

3. Test each solution in Row A (wells A1-A5) with red litmus paper. Dip a stirring rod into

the solution, then touch the stirring rod to the red litmus paper. Wipe the stirring rod

clean between each test. Record the color of the paper in Table 1.

4. Repeat step 3 using blue litmus paper.

5. Add 1 drop of phenolphthalein solution in Row A. Record the color of each solution in

Table 1.

6. Test each solution in Row B (wells B1-B5) using a pH test strip. Use the color chart on

the pH paper container to assign a numerical pH value to each solution and record in

Table 1.

7. Add 1 drop of universal indicator to each well B1-B5. Record the color of each solution

in Table 1.

8. Add one small piece of magnesium metal to each solution in Row C (wells C1-C5).

Observe any apparent reaction that takes place and compare the speed of reaction, if any,

in each well (you might need to add a few more drops for a clearer view of reaction).

Record all observations in Table 1.

9. Test for conductivity of each of the solutions. Record the conductivity results in Data

Table 1.

Part B – Neutralization Reaction of Acids and Bases

10. Slowly add 5 drops of HCl, followed by 1 drop of phenolphthalein, to wells D1 and D2.

11. Add NaOH to the hydrochloric acid in well D1, ONE DROP AT A TIME, stirring after

each drop. If the color disappears, add another drop. When the color remains after

stirring, record the number of drops added in Table 2.

12. Add 5 drops of distilled water to the solution in well D2. Repeat step 11 to test the

solution in well D2. Record the number of drops of NaOH added (Trial 2) in Table 2.

13. Repeat steps 10 through 12 with Acetic Acid in cells D3 and D4.

Properties Of Acids And Bases (Lab) Page 2

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