Does phenolphthalein turn pink in the presence of a base?
Does phenolphthalein turn pink in the presence of a base?
Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. Phenolphthalein is slightly soluble in water and usually is dissolved in alcohols for use in experiments.
What happens when methyl orange is mixed with HCl?
When methyl orange is added to dilute hydrochloric acid, the color of the solution gets converted into red. Methyl orange is one of the widely used pH indicators, which is used in the titration. When methyl orange is used as an indicator with acid, the color of the solution turns red.
Why does methyl orange turn yellow in an alkaline solution?
Explanation: Methyl orange is a pH indicator that is red in acidic medium and yellow in alkali medium. Since potassium hydroxide, KOH , is a strong base, the pH of the solution will be higher than 7 , which of course implies that adding methyl orange to the solution would change its color to bright yellow.
What is the Colour of methyl orange and phenolphthalein in basic medium?
Answer. ➩ Methyl orange and phenolphthalein use as indicator , In Acidic solution Methyl orange gives red colour but in basic solution it gives yellow colour . In Acidic solution phenolphthalein is colourless but in basic it gives pink colour .
What Colour is phenolphthalein in a neutral solution?
Phenolphthalein works somewhat differently as it is naturally colorless but turns pink in alkaline solutions. The compounds remains colorless throughout the range of acidic pH levels but begins to turn pink at a pH level of 8.2 and continues to a bright purple in stronger alkalines.
Why do we use double indicators?
Double indicators Denying other vehicles to overtake yours. This could be because there is an emergency or visible danger ahead. Employing double indicators would be a means of informing others not to proceed.
What is the Colour of phenolphthalein in Na2CO3 solution?
pink
Which indicator is suitable for the titration of HCl and NaOH?
phenolphthalein