Question

(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 a test-tube containing water?

Answer 1

Answer:

a) universal indicator can show us exactly how strongly acidic or alkaline solution. is this is measured using the phone scale. The ph scale run from ph 0to ph 14 . universal indicator has many different colour change from red from strong acid to dark purple for strong basses

b )

• a universal indicator is a ph indicator composed of a solution of several compount that exhibit several smooth colour change the acidic for alkaline of solutions where 7 indicator neutral

Answer 2

(a) A Universal indicator is a solution with a mixture of indicators used for determining the pH of solutions.  

(b) A Universal indicator is used for finding whether the provided solution is a base or an acid.  

(c)When a few drops of the universal indicator are added to water, it turns to a green colour.

Explanation:

• With different pH environments, the colour of the universal indicator changes. When the pH of the solution is low, it becomes red. When the solution is high, it becomes violet or blue.
• The pH of a neutral substance is 7. So, when a few drops of the universal indicators are added water in a test-tube, it turns into a green color.

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