What happens when phenolphthalein is added to HCl?
What happens when phenolphthalein is added to HCl?
On adding nearly 5 mL sodium hydroxide solution to the mixture of hydrochloric acid and phenolphthalein solution, the colour of the mixture changes to pink. On addition of hydrochloric acid solution to the pink solution, the colour starts fading gradually and finally the solution becomes colourless.
What colour does phenolphthalein turn in hydrochloric acid?
Answer. Phenolphthalein is an indicator which is colourless in acidic medium and pink in basic medium. Since Hydrochloric acid is an acid,the solution will turn Colourless.
Does HCl turn phenolphthalein?
Answer and Explanation: Answer: Phenolphthalein will be colourless in 0.1M HCl solution.
Does HCl turn phenolphthalein pink?
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.
| Names | |
|---|---|
| Melting point | 258–263 °C (496–505 °F; 531–536 K) |
| Solubility in water | 400 mg/L |
What is the effect of dilute HCl on the Colours of phenolphthalein?
So dilute HCl solution has no effect on phenolphthalein solution as it remains colorless in acidic solution. Methyl orange indicator would turn dilute HCl solution to reddish pink color. Dilute HCl solution would turn blue litmus paper to red color.
Does phenolphthalein impart some characteristic color to dilute HCl?
HCl is a acidic solution, thus phenopthalein doesn’t show any change in colour when reacted with HCl.
Why does phenolphthalein turn pink then clear?
The Phenolphthalein pH Range Phenolphthalein is naturally colorless but turns pink in alkaline solutions. The compound 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 magenta at pH 10 and above.
Which solution will turn phenolphthalein pink?
The answer is NaOH or Sodium Hydroxide as it is a base.
Why is HCl used in titration?
Hydrochloric acid (HCl) is usually not used in the process of titration because it reacts with the indicator potassium permanganate (KMnO4) that is used in the process. It reacts with KMnO4 solution and gets oxidized which further results in the liberation of chlorine gas.
Why is phenolphthalein used as an indicator in a NaOH and HCl titration?
Which indicator is used in acid-base titration? Using a phenolphthalein indicator, a strong acid- strong base titration is performed. Phenolphthalein is selected because it changes colour between 8.3-10 in a pH range. In basic solutions, it will appear pink, and clear in acidic solutions.
What colour is hydrochloric acid?
colorless
At room temperature, hydrogen chloride is a colorless to slightly yellow, corrosive, nonflammable gas that is heavier than air and has a strong irritating odor.
In which solution would phenolphthalein turn pink?
Phenolphthalein is naturally colorless but turns pink in alkaline solutions. The compound 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 magenta at pH 10 and above.