在S.海岛。 Miguel, 2007年更加频繁的MRT采样被实施了。[translate] aadd 1 drop of phenolphthalein indicator solution and the right amount of ammonia solution to make the solution show light red 增加酚酞显示解答1下落和正确的相当数量氨解答使解答展示浅红色[translate]...
Disappearing ink is a water-basedacid-base indicator(pH indicator) that changes from a colored to a colorless solution upon exposure to air. The most common pH indicators for the ink arethymolphthalein(blue) orphenolphthalein(red or pink). The indicators are mixed into a basic solution that ...
Describe how on a molecular level the indicator phenolphthalein works in different transitions. Describe the differences between single-beam and double-beam instruments for absorbance measurements. List any particular advantages possessed by one over th...