A scientist wants to test how much of an acid can be added to a solution before the pH of the solution changes to below a certain point. The starting
pH of the solution is 6.0, and the scientist wants to know when the pH of the
solution changes to below 4.0,
Which pH indicator should the scientist use?

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.

phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.

its probably to later but whats the question