Acids and Alkalis: Part 1

The properties of strong acids and alkalis can be extremely harmful. Where do we find them, and how can we tell how acidic or alkaline a substance is? Chemistry - Reactions - Learning Points. Bases neutralise acids, and if a base dissolves in water then the solution is an alkali. Weak acids are safe to consume, but stronger acids can be harmful, irritant or corrosive. Acids have a pH of less than 7 and alkalis have a pH greater than 7. Universal Indicator solution can test any liquid to see how acidic or alkaline it is. A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes – directly linked to core learning, Twig's curriculum films will fit neatly into your lesson plans.