Hello! So to answer your question all the answers can be found within the above chart provided. Simply compare and contrast the pH levels in which the indicators changed color.
So doing that we can conclude the followoing pertaining to our indicators. Bromothymol blue 5.3-7.3
Methyl yellow 2.4-4.3
Bromocresol green 3.3-5.3
Red cabbage extract 3.3-5.3
For your second question it is the exact same concept, but we can just look at our answer for the first question to conclude which indicator would be best used for those ph levels.
Comparing and contrasting we can see that the best indicator to use for observing PH changes around pH= 2 would be Methyl yellow,
for around pH=4 would be Bromocrescol green,
and for pH= 6 it would be Bromothymol blue.
If you have any other questions or would like further explanation just let me know! :)
Answer:
electrons on the the outer most shell of an element
Bleh bleh bleh bleh bleh bleh bleh bleh and bleh
Earth is the only planet in the solar system with an atmosphere that
can sustain life. The blanket of gases not only contains the air that we
breathe but also protects us from the blasts of heat and radiation
emanating from the sun. It warms the planet by day and cools it at
night.
Earth's atmosphere is about 300 miles (480 kilometers) thick, but most
of it is within 10 miles (16 km) the surface. Air pressure decreases
with altitude. At sea level, air pressure is about 14.7 pounds per
square inch (1 kilogram per square centimeter). At 10,000 feet (3 km),
the air pressure is 10 pounds per square inch (0.7 kg per square cm).
There is also less oxygen to breathe.
If it were to be in a different position, life can no longer be alive on Earth.
Hoped I helped!