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Hydrochloric acid (HCl) is a strong acid that will react with phenolphthalein, a pH indicator, causing it to turn colorless in acidic conditions. This reaction occurs due to the change in pH of the solution, which shifts the equilibrium of the phenolphthalein molecule leading to its color change.
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Why is phenolphthalein colorless in hydrochloric acid?
Phenolphthalein is colorless in acidic conditions, such as hydrochloric acid, because it undergoes protonation, forming a colorless form of the molecule. This protonation reaction alters the structure of phenolphthalein, preventing it from exhibiting a color change.
What is the equation for neutralization of hydrochloric acid and phenolphthalein?
The neutralization of hydrochloric acid with phenolphthalein does not involve an equation. Phenolphthalein is a pH indicator that changes color at a certain pH range (8.2-10), making it useful for determining the endpoint of a titration involving an acid-base reaction like the neutralization of hydrochloric acid with a base.
Why does hydrochloric acid change phenolphthalein purple to colorless?
Hydrochloric acid is a strong acid that neutralizes the alkaline properties of phenolphthalein, turning it colorless. This reaction occurs because the acid donates hydrogen ions, causing a shift in the pH balance and resulting in the loss of the pink or purple color in phenolphthalein.
What happens if phenolphthalein solution is added in hydrochloric acid?
If phenolphthalein solution is added to hydrochloric acid, it will remain colorless since the pH of hydrochloric acid is too low for phenolphthalein to change color. Phenolphthalein typically turns pink in a basic solution but does not show a color change in acidic conditions.
What is the equation of sodium hydroxide with phenolphthalein with hydrochloric acid?
The equation for the reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl) using phenolphthalein indicator is: NaOH + HCl → NaCl + H2O Phenolphthalein is a pH indicator that turns pink in basic solutions and colorless in acidic solutions.
Why is phenolphthalein colorless in hydrochloric acid?
Phenolphthalein is colorless in acidic conditions, such as hydrochloric acid, because it undergoes protonation, forming a colorless form of the molecule. This protonation reaction alters the structure of phenolphthalein, preventing it from exhibiting a color change.
What is the equation for neutralization of hydrochloric acid and phenolphthalein?
The neutralization of hydrochloric acid with phenolphthalein does not involve an equation. Phenolphthalein is a pH indicator that changes color at a certain pH range (8.2-10), making it useful for determining the endpoint of a titration involving an acid-base reaction like the neutralization of hydrochloric acid with a base.
Why does hydrochloric acid change phenolphthalein purple to colorless?
Hydrochloric acid is a strong acid that neutralizes the alkaline properties of phenolphthalein, turning it colorless. This reaction occurs because the acid donates hydrogen ions, causing a shift in the pH balance and resulting in the loss of the pink or purple color in phenolphthalein.
What happens if phenolphthalein solution is added in hydrochloric acid?
If phenolphthalein solution is added to hydrochloric acid, it will remain colorless since the pH of hydrochloric acid is too low for phenolphthalein to change color. Phenolphthalein typically turns pink in a basic solution but does not show a color change in acidic conditions.
What is the equation of sodium hydroxide with phenolphthalein with hydrochloric acid?
The equation for the reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl) using phenolphthalein indicator is: NaOH + HCl → NaCl + H2O Phenolphthalein is a pH indicator that turns pink in basic solutions and colorless in acidic solutions.
Phenolphthalein change color when mixed with hydrochloric acid?
Phenolphthalein is a pH indicator that changes color in response to a change in pH. When mixed with hydrochloric acid (a strong acid), phenolphthalein will turn colorless due to the decrease in pH, indicating an acidic solution.
What colour does hydrochloric acid turn phenolphthalein?
It should be clear. Phenolphthalein doesn't change color in the presence of an acid, only a base.
Is hydrochloric acid and phenolphthalein a chemical change?
When HCl and phenolphthalein are mixed, a chemical reaction occurs leading to a change in the color of the solution (from pink to colorless). This is a chemical change as new substances are formed with different properties than the original substances.
What is the word equation for the reaction of calcium and hydrochloric acid?
The word equation for the reaction of calcium and hydrochloric acid is: calcium + hydrochloric acid → calcium chloride + hydrogen.
What kind of reaction is zinc and hydrochloric acid?
Solid Zinc reacting with Hydrochloric Acid is a single replacement Oxidation/Reduction reaction.
Is phenolphthalein an indicator?
Yes, phenolphthalein is an indicator commonly used in acid-base titrations to determine the endpoint of the reaction.
What is the name of reaction when the zinc react with hydrochloric acid?
The reaction between zinc and hydrochloric acid is called a single replacement reaction. In this reaction, zinc displaces hydrogen from hydrochloric acid to form zinc chloride and hydrogen gas.
