Elements Compounds And Mixtures Flashcards
(36 cards)
What is an alkali
A chemical compound that neutralises an acid, typically corrosive
What is an acid
A chemical substance that is typically corrosive or sourly tasting, it neutralises alkali
What is an element
An element is made up of one type of atom
What is a Compound
A compound is 2 or more different elements chemically bonded together
What does neutral mean
In the middle of acid or alkali, ph 7 (water)
What is a mixture
A mixture is a mix of two or more compounds and atoms not chemically bonded together
What is a solvent
A solvent is the substance which the solute dissolves in a liquid
What is a solvent
A solvent is the substance which the solute dissolves in a liquid
What is a solute
A solute is the solid that dissolves in a solvent to make the solution
What is the solution
The overall product
What is saturated
A solution made when the maximum amount of a solute that can be dissolved
What is an indicator
A ph indicator measures the acidity or alkaline of a substance
Ph levels of acids?
1-7
Ph of alkali’s
7-14
What is a valency
Valences can be used to work out the chemical formula of a compound or element
The cross over rule
Valency of zinc= 2
Valency of chlorine= 1
What is the chemical formula
ZnCl2
When working out the chemical formula for OH NO3 SO4 CO3 and PO4 what do you do
Put brackets around the group (e.g zn(OH)2)
What is the chemical formula of hydrochloride nutrition
HCL
What is the formula of sulphuric acid
H2SO4
What is the formula of nitric acid
HN03
What colour does methyl orange go in an acid
Red
Methyl orange in alkaline
Yellow
Methyl orange neutral
Orange
Phenolphthalein in acid
Colourless
