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Why is it difficult to see whether you have added the pH indicator phenopthalein to the flask of acid solution?
It can be difficult to see whether phenolphthalein has been added to an acid solution because phenolphthalein is colorless in acidic conditions. When mixed with a strong acid, the solution will not exhibit any color change, making it challenging to visually confirm its presence. Additionally, if the solution is cloudy or has other impurities, this can further obscure the indicator's clarity.
What else can I help you with?
How could an indicator be used to find out if something is acidic or alkline if the label was missing?
An indicator can be used to determine whether a solution is acidic or alkaline by changing color in response to the pH level of the solution. For instance, litmus paper turns red in acidic conditions (pH < 7) and blue in alkaline conditions (pH > 7). Similarly, phenolphthalein is colorless in acidic environments and turns pink in alkaline solutions. By adding the indicator to the solution and observing the color change, one can identify whether the solution is acidic or alkaline.
Does it turn to universal indicator blue?
The universal indicator turns blue in the presence of alkaline (basic) substances, typically with a pH greater than 7. If a solution is acidic (pH less than 7), the indicator will show colors ranging from red to yellow. Therefore, whether the indicator turns blue depends on the pH level of the solution being tested.
What liquid do you use to test the pH scale?
A pH testing liquid called universal indicator solution is commonly used to test the pH scale. It changes color depending on whether the substance is acidic, neutral, or basic.
An indicator with Ka equals 1.25 x 10-4 could be used to tell you whether a solution has a pH above or below?
A Ka value of 1.25 x 10-4 indicates a weak acid. This means that the indicator would be most effective at detecting solutions with a pH close to the pKa value of the indicator, which is approximately 3.9. Therefore, the indicator could be used to determine if a solution has a pH above or below 3.9.
Why is a indicator's reaction in acids and bases a chemical change?
When an indicator is added to an acid or base, it undergoes a chemical reaction with the hydrogen or hydroxide ions present in the solution. This reaction causes a change in the color of the indicator, indicating a shift in the pH of the solution. Since a new substance with different properties is formed during this reaction, it is considered a chemical change.
Indicator that can help us identify whether a solution contains an acid or what?
This is a pH indicator.
What is used as an indicator of whether a solution is acidic or basic?
pH strips are used to determine whether a solution is acidic or basic
What color does the indicator turn when starch is present?
Iodine is used to indicate whether starch is present in a solution. If starch IS present, the indicator will turn dark blue/black. Iodine is used to indicate whether starch is present in a solution. If starch IS present, the indicator will turn dark blue/black. FOR WHAT PURPOSE WE USE STARCH-IODINE INDICATOR PAPER
What is indicator used for?
An acid base indicator is used for determining the pH of a solution, and determining if it is an acid, a base, or neutral solution. Red-ox indicators are used to check whether a desired red-ox reaction has proceeded to its completion.
Ph-indicator?
A pH indicator is a substance that changes color based on the acidity or basicity of a solution. It is often used in chemistry experiments to determine the pH of a solution. Common pH indicators include litmus paper, phenolphthalein, and universal indicator.
How does a pH indicator separate acids from bases?
A pH indicator changes color depending on the acidity or basicity of the solution it is in. In an acid, the indicator will have one color and in a base, it will have a different color. By observing the color change in the pH indicator, one can determine whether the solution is acidic or basic.
What changes color on pH?
An indicator is a substance that changes color based on the pH of a solution. It shifts its color based on whether the solution is acidic, neutral, or basic. Examples of indicators include litmus, phenolphthalein, and bromothymol blue.
What indicator substance is used to test a leaf for starch?
Iodine Solution is used to determine whether starch is present.
How could an indicator be used to find out if something is acidic or alkline if the label was missing?
An indicator can be used to determine whether a solution is acidic or alkaline by changing color in response to the pH level of the solution. For instance, litmus paper turns red in acidic conditions (pH < 7) and blue in alkaline conditions (pH > 7). Similarly, phenolphthalein is colorless in acidic environments and turns pink in alkaline solutions. By adding the indicator to the solution and observing the color change, one can identify whether the solution is acidic or alkaline.
Does it turn to universal indicator blue?
The universal indicator turns blue in the presence of alkaline (basic) substances, typically with a pH greater than 7. If a solution is acidic (pH less than 7), the indicator will show colors ranging from red to yellow. Therefore, whether the indicator turns blue depends on the pH level of the solution being tested.
What liquid do you use to test the pH scale?
A pH testing liquid called universal indicator solution is commonly used to test the pH scale. It changes color depending on whether the substance is acidic, neutral, or basic.
A substance that is used to determine an acid or base is called?
An indicator is a substance that is used to determine whether a solution is acidic or basic by changing color based on the pH of the solution. Examples of indicators include litmus paper, phenolphthalein, and bromothymol blue.
