Objectives:
Procedure:
1. Partner A: Place the shredded red cabbage into the mortar. Use the pestle to grind it until most of the juice is extracted. Remove the red cabbage leaves from the mortar.
2. At the same time, Partner B will:
a. Label the test tubes 1 to 5. (using the white board marker)
b. Put 2 ml of HCl in test tube 1.
c. Put 2 ml of NaOH in test tube 2.
d. Put 2 ml of Solution X in test tube 3.
e. Put 2 ml of Solution Y in test tube 4.
f. Put 2 ml of Solution Z in test tube 5.
***MAKE SURE TO USE SEPARATE DROPPERS TO AVOID CONTAMINATION!!!***
3. Using another dropper, put 2 to 3 drops of the red cabbage indicator into each test tube.
4. Document your results and observations.
Materials and Apparatus:
- Explain how an indicator can be extracted from plants.
- Identify acids and alkalis using evidence from indicators
Procedure:
1. Partner A: Place the shredded red cabbage into the mortar. Use the pestle to grind it until most of the juice is extracted. Remove the red cabbage leaves from the mortar.
2. At the same time, Partner B will:
a. Label the test tubes 1 to 5. (using the white board marker)
b. Put 2 ml of HCl in test tube 1.
c. Put 2 ml of NaOH in test tube 2.
d. Put 2 ml of Solution X in test tube 3.
e. Put 2 ml of Solution Y in test tube 4.
f. Put 2 ml of Solution Z in test tube 5.
***MAKE SURE TO USE SEPARATE DROPPERS TO AVOID CONTAMINATION!!!***
3. Using another dropper, put 2 to 3 drops of the red cabbage indicator into each test tube.
4. Document your results and observations.
Materials and Apparatus:
MATERIALS HCl (0.1 mol) NaOH (0.1 mol) Solution X Solution Y Solution Z Red Cabbage | APPARATUS mortar and pestle 6 droppers 5 test tubes 1 test tube rack white board marker safety goggles |
Procedure:
1. Partner A: Place the shredded red cabbage into the mortar. Use the pestle to grind it until most of the juice is extracted. Remove the red cabbage leaves from the mortar.
2. At the same time, Partner B will:
a. Label the test tubes 1 to 5. (using the white board marker)
b. Put 2 ml of HCl in test tube 1.
c. Put 2 ml of NaOH in test tube 2.
d. Put 2 ml of Solution X in test tube 3.
e. Put 2 ml of Solution Y in test tube 4.
f. Put 2 ml of Solution Z in test tube 5.
***MAKE SURE TO USE SEPARATE DROPPERS TO AVOID CONTAMINATION!!!***
3. Using another dropper, put 2 to 3 drops of the red cabbage indicator into each test tube.
4. Document your results and observations.
Guide Questions:
1. In your opinion, was the red cabbage juice a good indicator? Explain your answer.
Yes the red cabbage juice is a really good indicator,because it is user-friendly and wouldn't be harmful, and it also shows a wide range of pH values.
2. On a scale of 1 to 5, 5 being the best, rate your participation in this investigation and explain why.
5, because I was the only person in my group. So i did what two people need to do.
3. On a scale of 1 to 5, 5 being the best, rate your other 2 group members’ participation in this investigation and explain why.
Well i'm the only one in my group but Mrs Naz helped me with grinding the red cabbage.
4. How can you improve your investigation?
I think I should get a partner so the experiment can be completed faster.
RESULTS AND OBSERVATIONS:
1. Partner A: Place the shredded red cabbage into the mortar. Use the pestle to grind it until most of the juice is extracted. Remove the red cabbage leaves from the mortar.
2. At the same time, Partner B will:
a. Label the test tubes 1 to 5. (using the white board marker)
b. Put 2 ml of HCl in test tube 1.
c. Put 2 ml of NaOH in test tube 2.
d. Put 2 ml of Solution X in test tube 3.
e. Put 2 ml of Solution Y in test tube 4.
f. Put 2 ml of Solution Z in test tube 5.
***MAKE SURE TO USE SEPARATE DROPPERS TO AVOID CONTAMINATION!!!***
3. Using another dropper, put 2 to 3 drops of the red cabbage indicator into each test tube.
4. Document your results and observations.
Guide Questions:
1. In your opinion, was the red cabbage juice a good indicator? Explain your answer.
Yes the red cabbage juice is a really good indicator,because it is user-friendly and wouldn't be harmful, and it also shows a wide range of pH values.
2. On a scale of 1 to 5, 5 being the best, rate your participation in this investigation and explain why.
5, because I was the only person in my group. So i did what two people need to do.
3. On a scale of 1 to 5, 5 being the best, rate your other 2 group members’ participation in this investigation and explain why.
Well i'm the only one in my group but Mrs Naz helped me with grinding the red cabbage.
4. How can you improve your investigation?
I think I should get a partner so the experiment can be completed faster.
RESULTS AND OBSERVATIONS:
Chemical HCl NaOH Distilled water Solution X Solution Y Solution Z | Color Red Blue Purple purple green turquoise | Acid, Alkali, Neutral Acid Alkali Neutral Neutral Alkali Alkali | Reason Red cabbage indicator turns red because the indicator was is in very acidic condition NaOH contains hydroxide and any substance contains hydroxide is alkali Neutral substance's colour will be purple because the red cabbage is purple. Same as distilled water it is neutral. it is slightly diluted alkali This substance is slightly more concentrated than solution Y. |