Acids And Alkalis Flashcards
Acid
A substance that has a pH lower that 7
Corrosive
A substance which reacts with materials and makes them dissolve
Irritant
Something that reddens the skin
Hydrogen
An atom which is in all acids
Alkali
Has a pH higher than 7
Soapy
The effect produced when an alkali is added to water
Hydroxide
The particle which is always in an alkali
Indicator
a dye that can change colour when placed in environments with different pH values
Litmus
An indicator which tells us if something is and acid or an alkali
Neutral
When a substance is neither an acid or an alkali
Strong acid/alkali
Contains a lot of hydrogen (acid) or a lot of hydroxide particles (alkali)
Weak acids/alkalis
contains only a few hydrogen particles (acid) or a few hydroxide particles (alkali)
Universal indicator
A mixture of dyes which create A range ofcolours depending on the strength of acidity or alkalinity being tested
pH number
The scale of 1-14 which shows alkalinity or acidity
Neutralisation
When an acid and alkali combine resulting in products with pH of 7
Titration
A lab method allowing accurate volumes of liquids to be measured
Water
A molecule of water contains 2 hydrogen particles and 1 oxygen particles
Neutral
When a substance is neither acidic nor alkakine
Salt
A substance formed when an acid reacts with a base
Equation
A way of summarising a chemical reaction with the reactants on the left off the arrow and the products on the right
Base
Something which neutralises an acid
