Bromophenol blue is another common acid-base indicator which changes color from yellow in acidic solution to blue in basic solution. the ph values for this indicator are in a range of approximately 3 to 4.6. instead of using phenolphthalein in the ch3cooh-naoh titration, if bromophenol blue was used, would the calculated molarity of acetic acid be high, low, or the same?

What material does not melt at any temperature

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.