Unit 1-Chemical Changes And Structures Flashcards
As the temperature of reaction increases…
The rate of reaction increases
The higher the concentration…
The faster the reaction
The smaller the particle size…
The faster the reaction
What is a catalyst?
Catalyst change the rate of a reaction but are not used up in the reaction
What are the three stages of a reaction when catalysts are used
Adsorption, reaction, desorption
How do you calculate the average rate of reaction
Average rate= change in mass/change in time
What are the three parts of an atom?
Electrons, protons, neutrons
What is the relative mass, charge and location of the electron?
Zero, negative one, energy level
What is the relative mass, charge and location of protons?
One, positive one, nucleus
What is the relative mass, charge and location of the neutron?
One, no charge, nucleus
What is an isotope?
Isotopes are atoms of the same atomic number but different mass numbers
What is an ion?
An ion is a charge particle and formed when atoms lose or gain electrons
What is a molecule?
Molecules are non-metal compounds join together by covalent bonds
What is a covalent bond?
A covalent bond is a shared pair of electrons between two non-metal atoms
Explain how covalent bonding works?
Atoms are held together because of the electrostatic force of attraction between the positive nuclei of each atom and the negatively charged electrons.
What is ionic bonding?
Ionic bonds are the electrostatic forces of attraction between positive and negative ions
What are the four things that can change the rate reaction?
temperature, concentration, particle size, use of a catalyst
What is the structure of an ionic compound?
And ionic lattice structure
Ionic compounds conduct electricity when…
They are in solution or in a melt
What is the equation for calculating mass in grams?
M=nxgfm
What is equation to work out the concentration of a solution?
C=n/v
What is the functional group of an acid?
H+ ion
What is the functional group of the alkalis?
OH ion
How do you form an acid?
By dissolving a non-metal in water
How do you form an alkali?
By dissolving a metal oxide in water
What is the product of a neutralisation reaction?
Salt and water
What is the product when acids react with metal carbonates?
Salt, water and carbon dioxide
