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Du er her: Skole > Indicators

Indicators

Naturfagsrapport på engelsk om indikatorer.

Sjanger
Rapport
Språkform
Engelsk
Lastet opp
06.02.2006


Materials:
* 0.10 mol dm-3 NaOH solution
* 0.10 mol dm-3 HCl solution
* Two indicators labelled “A” and “B”
* Cell Well
* Drop counters
* Distilled water

Introduction:
The HCl solution has a pH of 1.0 and the NaOH has a pH of 13.0 initially. And in this experiment our goal is to determine:
1) The different colours.
2) And the pH interval where the colour changes for each indicator.

Procedure:
Please, look at the enclosure!

Data and Observations:
I took a few mL-s of HCl in the first well, and from this well, I transferred one drop to the next well and added nine other drops of water.

 

From this well number two, I transferred one drop of the solution to the next well, and added nine drops of water. Mixed it well, and continued like this until I had six wells in total.

 

Then, I used the same procedure to dilute NaOH, so that I ended up with six wells with NaOH solutions. And to each of the wells, I added a small amount of indicator “A”, and I did make observations and drew a conclusion, which is showed on the next page.


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