Question

what is an indicator and how is it used in the study of acids and alkalis? take the example of and two indicator to support your answer​

Answer 1

$\huge\boxed{\underline{\mathbb{\red{A}\green{n}\pink{S}\orange{w}\blue{E}\pink{r:-}}}}$

What are indicators

Indicators are substances that change colour when they are added to acidic or alkaline solutions. Litmus, phenolphthalein, and methyl orange are all indicators that are commonly used in the laboratory.

Example..

Examples of acid-base indicators include litmus paper, phenolphthalein, and red cabbage juice. An acid-base indicator is a weak acid or weak base that dissociates in water to yield the weak acid and its conjugate base or else the weak base and its conjugate acid.

Answer 2

$\huge\bold{\mathtt{\purple{A{\pink{N{\green{S{\blue{W{\red{E{\orange{R}}}}}}}}}}}}}$

$\huge\underline\mathfrak\red{Indicators}$

Indicators are substances that change colour when they are added to acidic or alkaline solutions. Litmus, phenolphthalein, and methyl orange are all indicators that are commonly used in the laboratory. Examples of acid-base indicators include litmus paper, phenolphthalein, and red cabbage juice.

$\huge\underline\mathfrak\red{Experiment}$

$\huge\underline\mathfrak\orange{Requirements}$

• Eye protection
• Watch glasses, 1 per sample (note 1)
• White tiles, 1 per sample (note 1)
• Red and blue litmus paper, 3 pieces of each per working group

$\huge\underline\mathfrak\orange{Chemicals}$

• fizzy drinks
• tap water
• de-ionised/distilled water
• toothpaste
• shampoo
• soap
• vinegar
• lemon juice

$\huge\underline\mathfrak\orange{Process}$

1. Tear each piece of litmus paper into three smaller pieces so that you can test at least nine substances.
2. Take one small piece of red litmus paper. Dip it into one of the substances to be tested. Repeat with a small piece of the blue litmus paper.
3. Record all observations in a suitable table. Then dispose of the pieces of litmus paper in the waste bin.

$\huge\underline\mathfrak\red{Results}$

The substance is acidic when

the blue Litmus paper turns red and the red Litmus paper is unaffected

The substance is alkaline when:

the red Litmus paper turns blue and the blue Litmus paper is unaffected

If neither red nor the blue paper changes colour, the substance is neutral.

${\huge{\fcolorbox{black}{PINK}{♡ハンジュフイ♡}}}$