Another Exciting experiment for today! This time it involves a vegetable indicator, Red Cabbage!( Although it was purple in colour... ) Wow, how special!
Apparatus used:
1) Test tubes
2) Test tube rack
3) Droppers
4) Red Cabbage Leaves
5) Dillute Hydrochloric Acid
6) Dillute Sodium Hydroxide
7) A 100ml beacker
All apparatus was prepared and the red cabbage was cut for us. Now , we start our experiment in a hurry. Five red cabbage leaves must be added into the beaker before adding 30cm3 of water and heating up the beaker(with the cabbage leaves) for ten minutes. After the work of heating the beaker for 10 minutes using a Bunsen Burner with the help of a lighter , let mixture in the beaker cool down. ( Inside the beaker contains purple liquids, Concept: Heating something up will cause it to lose colour, if there's water, colour will be lost to the water. )
The next step is to pour the red cabbage indicator(the purple liquid in the beaker) into each test tubes. For every indication solution we add one type of liquid ; Dillute Hydrochloric Acid for the first test tube , Dillute Sodium Hydroxide in the second one and Vinegar in the third one. Now we have a small rainbow of liquids ; Green (the most special one as we never know that it can turn green.) , dark and light red, and purple for the original one. Now all is done !(After finishing the worksheet also. )
"Ring" The timing is just right, now its time to hand in all the worksheets! ^_^
What I Have Learnt:
1) Red Cabbage can also be used as indicator.
2) Adding too much of either the Dillute Hydrochloric Acid or Dillute Sodium Hydroxide etc can cause changes in colours of liquids.
Questions:
1) Can all the vegetables be used as an indicator?
2) Are Dillute Hydrochloric Acid and Dillute Sodium Hydroxide just considered as Acid and Alkalis ( Its not an indicator right? Its used for finding out something such as the colour changes for experiments? But if that's so then there are answer's written on the Dillute Hydrochloric Acid says 'Acid' and now all of us know that it is an acid. Sorry I'm not very sure on this... *confused)
Apparatus used:
1) Test tubes
2) Test tube rack
3) Droppers
4) Red Cabbage Leaves
5) Dillute Hydrochloric Acid
6) Dillute Sodium Hydroxide
7) A 100ml beacker
All apparatus was prepared and the red cabbage was cut for us. Now , we start our experiment in a hurry. Five red cabbage leaves must be added into the beaker before adding 30cm3 of water and heating up the beaker(with the cabbage leaves) for ten minutes. After the work of heating the beaker for 10 minutes using a Bunsen Burner with the help of a lighter , let mixture in the beaker cool down. ( Inside the beaker contains purple liquids, Concept: Heating something up will cause it to lose colour, if there's water, colour will be lost to the water. )
The next step is to pour the red cabbage indicator(the purple liquid in the beaker) into each test tubes. For every indication solution we add one type of liquid ; Dillute Hydrochloric Acid for the first test tube , Dillute Sodium Hydroxide in the second one and Vinegar in the third one. Now we have a small rainbow of liquids ; Green (the most special one as we never know that it can turn green.) , dark and light red, and purple for the original one. Now all is done !(After finishing the worksheet also. )
"Ring" The timing is just right, now its time to hand in all the worksheets! ^_^
What I Have Learnt:
1) Red Cabbage can also be used as indicator.
2) Adding too much of either the Dillute Hydrochloric Acid or Dillute Sodium Hydroxide etc can cause changes in colours of liquids.
Questions:
1) Can all the vegetables be used as an indicator?
2) Are Dillute Hydrochloric Acid and Dillute Sodium Hydroxide just considered as Acid and Alkalis ( Its not an indicator right? Its used for finding out something such as the colour changes for experiments? But if that's so then there are answer's written on the Dillute Hydrochloric Acid says 'Acid' and now all of us know that it is an acid. Sorry I'm not very sure on this... *confused)