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2017年9月14日 · 3. Methyl orange (MO), as you know, is an acid-base indicator. The problem with those is that they do not distinguish between acidic and basic medium, but rather between different pHs. MO has a transition interval of 3.1-4.4, which means it's red below 3.1 and yellow over 4.4. Within this interval it's all about transition colors (red through ...
2020年5月18日 · A. username4650180. 12. In a solution becoming less acidic, methyl orange moves from red to orange and finally to yellow with the reverse occurring for a solution increasing in acidity. The entire color change occurs in acidic conditions. In an acid, it is reddish and in alkali, it is yellow. Methyl orange (pH indicator) below pH 3.1 above pH 4.4.
2015年12月16日 · This means that the red colour will dominate. This result is in line with observation, as methyl indicator will change colour from orange to red at a pH of 3.1-4.4, which is acidic. Does my reasoning therefore demonstrate that methyl indicator must be a weak base?
2023年2月3日 · So if the PkA of methyl orange is around 3.5, if equivalence point is around there would the solution be orange? If it is somewhere in between red and yellow, would one still say that the colour has "changed", or is that terminology more for complete colour
2021年5月22日 · 1. It has been saying that if adding too much indicator in solution, the ph value of solution would be changed. From this, it can be saying that indicators have a pH value. Methyl orange is the indicator I used in the experiment. "My question is whether methyl orange is basic or acidic so that it affects the pH value of solutions."
2017年9月11日 · I tried to observe colour change of fluorescein in strongly acidic and basic medium. What I noticed was that in acidic medium, addition of small amount of fluorescein gave red solution whereas when the same amount was added in basic medium, it gave fluorescent green solution.
2017年5月22日 · b) When methyl orange is added, $\ce{NaHCO3}$ is neutralized to $\ce{NaCl}$. But pH range of methyl orange is 3-4.5, but the solution obtained is neutral. How does methyl orange change its color, then?I think it is because of the $\ce{H2CO3}$ ($\ce{H2O + CO2}$) that is formed along with $\ce{NaCl}$, which makes the solution slightly acidic.
2019年5月14日 · A small addition of HCl H C l returns things back. Methyl orange is suitable for titration of strong or weak bases by strong acids, turning yellow to red. Much more suitable and frequently used indicator for weak acid titration is phenolphthalein with range pH = 8.2 (clear) − 10.0 (violet) p H = 8.2 (c l e a r) − 10.0 (v i o l e t) Aside of ...
2017年5月16日 · Since this gives an overall increase in the concentrations of both chemicals, neither has increased relative to the other, and the equilibrium position hasn't moved, so the colour doesn't change. I will show that this is incorrect for the reaction $$\ce{A + B <=> C},$$ even though it is correct for the reaction $$\ce{A <=> B}.$$
An indicator shows whether an substance is a base or an acid but during a neutralisation reaction the colour change occurs due to the solution be neutral (i.e pH is 7). But since the indicators only show colour change in an acidic or basic condition doesn't this mean the solution is either acidic or basic? acid-base. titration.
