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What is an indicator and what are the common indicators used for pH?
Wiki User
∙ 12y ago
They are molecules which change color at a certain pH. You can tell at which pH your solution is by using indicators and matching up their colors. See the Web Links to the left for some examples of indicators (there are many) and at what pH each one changes color.
Application of pH indicators:
Definition of Titration: Titration is a common laboratory method of quantitative/chemical analysis that can be used to determine the concentration of a known reactant.
Definition of a Buffer: A mixture that is resistant to change( or in this case to pH change). These are usually made up of a weak acid and its conjugate base.
Now that you know what a titration is then lets see what they are used for:
* Titrations * Buffers
An indicator in a titration is used to determine the pH of the solution when the reactant and the products are at the equivalence point(when moles of H+ from acid= moles of OH- from base).
Wiki User
∙ 16y ago
Wiki User
∙ 14y agoPhenolphthalein is one pH indicator. It turns colourless when in contact with an acid, and violet in contact with a base.
Wiki User
∙ 13y agothe pH scale tells you how acidic an object or liquid is.
Wiki User
∙ 13y agoThe pH indicators are monitors to determine weather a substance is an acid or base.
Wiki User
∙ 12y agothe common indicators are universal indicator and litmus paper
Wiki User
∙ 13y agoIt is used to indicate acidity or alkalinity
Wiki User
∙ 7y agoA pH indicator is a substance that changes color at a certain pH and is generally used in titration experiments to indicate the end point.
Wiki User
∙ 7y agoAdd a drop of the liquid on a small piece of pH-paper and compare the color with the color on the box of paper.
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What will change color in the presence of an acid or a base?
pH indicators change the color depending upon acidity or basicity.
How can a pH indicator be useful?
pH indicator works as the range by alkalinity wether it's basic or acidic. Indicator properties are often found naturally in plants (eg. litmus). pH indicators are often just refined versions of various natural plant chemicals or synthesized versions of them.
What chemical indicators are and what they are used for?
chemical indicators are completely an organic solutions that changes color in the solution we added them to it due to the change in PH.....they are used to determine the equevelant point and the end point in titration
What is natural indicators?
A natural indicator is a solution that changes colour at different pH levels, however these indicators are dissimialr to common indicators such as phenolphtalein as natural indicator solutions are dirived from chemicals from oragnic materials such as carrots, berries and beetroot
What is a pH indicators?
A pH indicator is a halochromic chemical compound that is added in small amounts to a solution so that the pH (acidity or alkalinity) of the solution can be determined easily. Normally, the indicator causes the colour of the solution to change depending on the pH.
Why can't a single indicator be used to tell the pH of a solution?
their are indicators that can.
What kind of indicators are used in precipitation titration?
An example of an indicator would be Phenol Red, or Universal Indicator. Depending on the pH range of the indicator and the pH range of the substrates you would use the appropriate indicator.
What are examples of synthetic pH indicators?
Red Cabbage Juice can be used as an easy natural indicator. Bromothymol Blue is a common chemical pH indicator
Examples of plant indicators for measuring pH values?
a plant pH indicator is onion
What do indicators tell us?
Indicators are used to tell a person whether or not a chemical is present or what pH a substance may be. Usually an indicator is a strip that is dipped into the substance and will change color based on the presence of a substance or pH.
What can use to make pH scale indicator?
Indicators are substances sensitive to different ranges of pH.
What will change color in the presence of an acid or a base?
pH indicators change the color depending upon acidity or basicity.
How can a pH indicator be useful?
pH indicator works as the range by alkalinity wether it's basic or acidic. Indicator properties are often found naturally in plants (eg. litmus). pH indicators are often just refined versions of various natural plant chemicals or synthesized versions of them.
What characteristics limit the usefulness of indicators?
Chemical indicators measure the pH directly Chemical indicators are highly expensive They must be chosen for a specific pH range Chemical indicators cannot determine the exact value of pH of the solution
What is the difference between an indicator and a universal indicator?
A pH meter uses a probe and voltmeter to measure pH digitally. Universal indicator is a mix of indicators that change colour to indicate the pH of the solution. pH meters are accurate and will detect changes quickly, whereas universal indicator is slow to change colour to indicate pH change.
What chemical indicators are and what they are used for?
chemical indicators are completely an organic solutions that changes color in the solution we added them to it due to the change in PH.....they are used to determine the equevelant point and the end point in titration
What is natural indicators?
A natural indicator is a solution that changes colour at different pH levels, however these indicators are dissimialr to common indicators such as phenolphtalein as natural indicator solutions are dirived from chemicals from oragnic materials such as carrots, berries and beetroot
