A substance that provides a visual indication of the pH of a test material.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....

Explore the pH scale, and discover whether a solution is acidic, alkaline or neutral.
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Chemistry - Reactions - L
ea
rning Points.
/> A Twig FactPack Film.
Open a discussion on what has been already...

We test the effects of smoking by drawing first air and then cigarette smoke through apparatus that contains mineral wool and universal indicator. The air has no effect, but the smoke discolours the wool and changes the colour of the...

We use a drinking straw, some water and universal indicator to show that breathing out creates acid. Universal indicator is added to the water to show its pH value. When we blow into the water the indicator changes colour showing that...

The video explains how to prepare a soluble salt using acids and alkalis. The presenter explains the concept of titration and its importance in determining the exact amount of acid required to neutralize a base. Through the process of...

In this video, the presenter explains how to make soluble salts. They begin by discussing state symbols and explaining how they can indicate whether a substance is soluble or insoluble. Then, they outline the steps for producing a salt...

This video is a lecture presentation on titrations. The presenter discusses the theory behind the experiment and then demonstrates how to carry out a titration to determine the volume of hydrochloric acid needed to neutralize a certain...

The video explains the concepts of acids, alkalis, neutralization reactions, and the pH scale. The video also shows how the pH scale is used to measure the acidity or alkalinity of a solution and gives examples of strong acids, strong...

The video discusses the required practical activities for analyzing and purifying water in a chemistry specification. The focus is on the steps involved in determining the mass of salts dissolved in seawater, measuring the pH of water...

In this video we will look at some different structures of butane - so they all have 4 carbons but just arranged differently.



We will also look at the the 5 different isomers for hexane - they all have 6 carbons...

"Learn the basics about the pH scale, universal indicator and litmus paper. Indicators tells if something is acidic, alkaline or neutral. Indicators are substances that show different colours when they are in acidic or alkaline...

This video discusses the various tests that chemists use to identify different gases like hydrogen, oxygen, carbon dioxide, chlorine, and ammonia. The presenter demonstrates each test using simple equipment like test tubes, splints, and...

Learn the basics about Indicators, more specifically for acid and bases. An indicator is a large organic molecule that works somewhat like a " color dye". Find out more in this video!

Learn all about the different indicators used in Chemistry including the universal indicator, litmus in the form of litmus paper, phenolphthalein, and methyl orange.

The video discusses acids and alkalis, the pH scale, and indicators. It explains what acids and alkalis are in terms of the ions they form when dissolved in water, and how their concentrations can be measured using the pH scale. The...