Explain the universal indicator.
The universal indicator is used to know the strength of acid or base. Universal indicator is a mixture of several indicators. It is a pH indicator made of a solution of several compounds that exhibits several smooth colour changes over wide range pH values to indicate the acidity or alkalinity of solutions The universal indicator shows different colours at different concentrations of hydrogen ions in a solution.
Related Articles Here are some results of solutions tested with universal indicator paper:
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(a) What is a universal indicator? For what purpose is it used?(b) How does a universal indicator work?(c) Water is a neutral substance. What colour will you get when you add a few drops of universal indicator to test-tube containing water?
When a student added universal indicator solution to one of the following chemicals, its colour changed to navy blue. The chemical is most likely to be :
(a) What would you expect the pH of pure water to be?(b) What colour would the universal indicator show in an aqueous solution of sugar? Why?(c) A sample of rain water turned universal indicator paper yellow. What would you expect its pH to be? Is it a strong or a weak acid?
In an experiment to measure the pH values of solutions, a student placed strips of universal indicator paper in four beakers containing solutions A, B, C and D. The colour of universal indicator paper in these solutions is as shown below :The solution having lowest pH value is:(1) A(2) B(3) C(4)D"
Two Solution X and Y are tested the universal indicator. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid?
State the universal law of gravitation.
Two solutions X and Y are tested with universal indicator. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid?
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What colour will universal indicator show if you add it to the following substances?(a) Potassium hydroxide, pH = 12 (b) Soda water, pH = 5(c) Sulphuric acid, pH = 2
What is an Indicator?
A student was given four unknown solutions in test-tubes marked A, B, C and D and asked to test them with universal indicator solution. He observed that on putting universal indicator solution, the solutions A, B, C and D turned blue, orange, green and red respectively. The test-tube which contains sodium chloride solution is :(1) A (2) B (3) C (4) D
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