what color is phenolphthalein in a basic solution

pink

Detailed Solution

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 an acid-base indicator which is colourless in acid solution but turns pink to red as the solution becomes alkaline.
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    What is the colour of phenolphthalein in basic solution and acidic solution?

    In Acidic solution phenolphthalein is colourless but in basic it gives pink colour .

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    Why is phenolphthalein pink in basic solution?

    Normally, all colours of the light pass through the Phenolphthalein solution and it appears colourless. But, when it exposed to alkaline then it starts to block the blue colour of the light spectrum, which turns the light pink.

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    What color does phenolphthalein become in a basic solution?

    Phenolphthalein turns a bright red color as its solution becomes basic. In a strongly basic solution, this red color fades to colorless. Phenolphthalein has the colorless structure shown in Figure 1 when the solution pH <8.

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    What color is phenolphthalein in a acidic solution?

    Phenolphthalein is an indicator — a chemical which changes colour depending on whether it meets an acid or a base. It turns purple if it meets something basic, such as ammonia; it stays colourless if it meets an acid like vinegar or a neutral substance like water.

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    What is the colour of phenolphthalein in acid and basic solution?

    In acidic solution, phenolphthalein gives a pink colour. The basic solution containing phenolphthalein is colourless.

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    Which turns phenolphthalein pink acid or 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.

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    Why is phenolphthalein colorless in acidic medium?

    Phenolphthalein is a weak acid. It does not dissociate in the acidic medium and remains in the unionised form. The unionised form is colourless and hence, phenolphthalein in acidic solution is Colourless.

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    What color does phenolphthalein turn in a basic solution?

    Phenolphthalein is a large organic molecule used as an acid–base indicator. Phenolphthalein turns a bright red color as its solution becomes basic. In a strongly basic solution, this red color fades to colorless.

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    Is phenolphthalein pink in basic solution?

    Phenolphthalein is naturally colourless and works differently then litmus paper. Also, it turns in pink colour in an alkaline solution or base. Moreover, the compound remains colourless in acids but starts to turn pink on pH 8.2 and continues to turn bright purple in strong bases.

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    Which turns phenolphthalein pink acid or 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.

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    What colour is phenolphthalein in acid and base solution?

    Phenolphthalein is colourless in an acidic solution and turns pink in a basic solution.

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    Is phenolphthalein pink in basic solution?

    Phenolphthalein solution turns pink in the presence of a base. This is because the hydroxide ions react with the acidic group present and lead to the formation of ions. These ions impart color to the solution. This is how phenolphthalein solution acts as an acid-base indicator in titrations.5 ngày trước

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    What causes phenolphthalein to turn 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.

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    Why phenolphthalein is Colourless in acidic medium and pink in basic medium?

    Phenolphthalein is a weak acid. It does not dissociate in the acidic medium and remains in the unionised form. The unionised form is colourless and hence, phenolphthalein in acidic solution is Colourless. In the alkaline medium, the ionisation of phenolphthalein increases considerably.

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    What happens to phenolphthalein in basic?

    In Acidic solution phenolphthalein is colourless but in basic it gives pink colour . They both are used as a pH indicator.

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    What color is phenolphthalein in basic solution?

    Phenolphthalein is a large organic molecule used as an acid–base indicator. Phenolphthalein turns a bright red color as its solution becomes basic. In a strongly basic solution, this red color fades to colorless.

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    Why is phenolphthalein colorless in acidic solution?

    Phenolphthalein is a weak acid. It does not dissociate in the acidic medium and remains in the unionised form. The unionised form is colourless and hence, phenolphthalein in acidic solution is Colourless.

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    What color is an acidic solution?

    The colours from yellow to red indicate an acidic solution, colours blue to violet indicate an alkaline solution and a green colour indicates that a solution is neutral. Wide-range pH test papers with distinct colours for each pH from 1 to 14 are also available.

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    What is the colour of phenolphthalein in acid and alkali?

    Phenolphthalein (often abbreviated to phph) is colourless in acidic or near-neutral conditions (pH = 0-8.3) but turns a pinky-fuchsia colour in basic/alkaline conditions (pH = 8.3-10).

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