Acids, Bases, and Indicators

Flashcards covering key vocabulary and concepts related to acids, bases, indicators, and neutralisation reactions discussed in the lecture notes.

National Science Day

Celebrated at the school with a science fair.

Litmus

A natural substance obtained from lichens, used as an acid-base indicator.

Litmus paper colors

Available in two colors - blue and red.

Acidic substances

Turn blue litmus paper to red.

Basic substances

Turn red litmus paper to blue.

Acid-base indicator

A substance that shows different colors in acidic and basic solutions.

Synthetic indicators

Made in laboratories.

Neutral substances

Do not affect either red or blue litmus paper.

Taste of acidic substances

Sour.

Taste of basic substances

Bitter and slippery to touch.

Red rose extract

Can be used as an acid-base indicator.

Red rose extract in acidic solution

Gives red color.

Red rose extract in basic solution

Gives green color.

Hydrangea flowers and soil acidity

Acidic soil produces blue flowers, while basic soil produces pink or red.

Turmeric paper

Can be used to test basic substances.

Turmeric paper and acidic substances

Cannot differentiate between acidic and neutral substances.

Olfactory indicators

Substances whose odors change in an acidic or basic medium.

Neutralisation reaction

Reaction where an acid and base are mixed, resulting in a neutral solution.

Products of a neutralisation reaction

Salt and water, with the release of heat.

Ant bite treatment

Applying moist baking soda to neutralise the formic acid.

Acidic soil treatment

Treat with lime (a base).

Basic soil treatment

Add organic matter like manure and composted leaves.

Treating factory waste

Neutralised by adding basic substances before releasing into lakes.

Father of Modern Indian Chemistry

Acharya Prafulla Chandra Ray (P.C. Ray).

Lime water

Solution of calcium hydroxide in water

Litmus preparation

Litmus is a natural substance obtained from lichens

Ascorbic Acid

also known as Vitamin C

Tartaric acid

An acid found in some edible substances

Red Hibiscus Flower

Can act as acid-base indicator

Guru Purnima

A day where teachers are respected and appreciated