The characteristics of phenolphthalein that makes it appropiate for use for tritation is that phenolphthalein is colourless in acidic media but pink in basic solutions.
That means that in the equivalence point (well, just a tiny amount of the solution being added after reaching the equivalence point) the colour of the solution being tritraed will change.
If the solution being triated is an acid, it will remain colourless with the phenolphtalein, and it will turn pink at the equivalence point.
You can do experiments without phenolphthalein if you use a different indicator of pH (substances that change of color when pass from acid to basic or from basic to acid). Some other indicators of pH are methyl red, bromothymol blue and thymol blue. There are others.
<u><em>NOTES TO TAKE DOWN: </em></u>
<em>Apparent brightness is a human measurement, and it would change for each star if the measurement were taken from another location. The more precise counterpart of apparent brightness is called absolute brightness (or absolute magnitude) and is the measure of the luminosity of a star, but on a common scale.</em>
<u><em>ANSWER:</em></u>
<em>Absolute brightness is the actual amount of light produced by the star, whereas apparent brightness changes with distance from the observer.</em>
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Que es el question que necesitas?
Answer:
Chromosphere
Explanation:
You see the middle layer of the sun’s atmosphere, the Chromosphere, at the start and end of a total eclipse.