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What substance is used as an acid-base indicator?
Phenolphthalein, Metyl Orange, Methyl Red, Thymol Blue and Bromothymol Blue are some of the commonly used acid-base indicators. The property of such indicators should be the capability of showing a distinct chemical change with respect to a particular pH value.
Why is thymol blue used as the indicator for titration of acetic acid and naoh?
An indicator that changes its colour around pH value 5 should be used in this titration. Alternatively, instead of Thymol Blue, Methyl Orange or Methyl Red may be used.
What colour would a mixture of thymol blue and phenolphthalein go if you added hydrochloric acid?
HCl has a pH of 1 so thymol blue would turn red in this acidic condition. Phenolphthalein is colorless in an acid so what you would see would be red.
Can reagent bromthymol blue or phenolphthalein could be considered to be an acid indicator?
Bromthymol blue is yeloww in acidic solutions, penolphthalein is colorless.
In HCl and NaOH titration which indicator is used?
Phenolphthalein indicates red for acids and blue for bases.
What does universal indicator contain?
Water, propan-1-ol, phenolphthalein sodium salt, sodium hydroxide, methyl red, bromothymol blue monosodium salt, thymol blue monosodium salt.
The name of the plant which universal indicator is made of?
From wikipedia: A universal indicator is typically composed of water, methanol, propan-1-ol, phenolphthalein sodium salt, methyl red, bromothymol blue monosodium salt, and thymol blue monosodium salt
In which solution will thymol blue indicator appears blue?
KOH
What substance is used as an acid-base indicator?
Phenolphthalein, Metyl Orange, Methyl Red, Thymol Blue and Bromothymol Blue are some of the commonly used acid-base indicators. The property of such indicators should be the capability of showing a distinct chemical change with respect to a particular pH value.
Why is thymol blue used as the indicator for titration of acetic acid and naoh?
An indicator that changes its colour around pH value 5 should be used in this titration. Alternatively, instead of Thymol Blue, Methyl Orange or Methyl Red may be used.
What colour would a mixture of thymol blue and phenolphthalein go if you added hydrochloric acid?
HCl has a pH of 1 so thymol blue would turn red in this acidic condition. Phenolphthalein is colorless in an acid so what you would see would be red.
Universal indicator is a mixture of what?
Universal indicators can be mixed with different substances. Universal indicators usually contain water, salt, propan-1-ol, sodium hydroxide, monosodium, phenolphthalein sodium salt, methyl red, bromothymol blue, and thymol blue monosodium salt
A well known indicator?
Phenolphthalein Litmus Red Litmus Blue Universal Indicator -> Most Common Methyl Orange :)
Can reagent bromthymol blue or phenolphthalein could be considered to be an acid indicator?
Bromthymol blue is yeloww in acidic solutions, penolphthalein is colorless.
Is methylene blue a chromophore?
Nope - methylene blue is a stain. You need liquid indicator like phenolphthalein that responds to pH changes.
In HCl and NaOH titration which indicator is used?
Phenolphthalein indicates red for acids and blue for bases.
Why is starch solution used as indicator in Sodium thiosulphate Iodine titrations instead of phenolphthalein indicator?
Phenolphthalein is an acid base indicator - it does not show the end-point in a thiosulfate type titration. Starch gives a very sharp end-point from a blue-black to colorless end-point when titrating iodine with thiosulfate. Phenolphthalein would just not detect this change.
