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Science Chemicals


Ways to speed up a reaction Volume Heat Temperature Human Help Energy
Neutralisation reactions base gets added to an acid and removes the h+ ions. this reaction is called a neutralisation reactions because neutral water molecules are formed.
alkalis Bases which are soluble in water are called Alkalis
Concentration This is the amount of substance in a given volume. Increasing the concentration will increase the number of particles available to react and therefore there will be more collisions and the rate of reaction will increase
Surface Area If surface area increases, more particles are available for collisions to occur and therefore the rate of reaction will increase.
Collision theory Collision theory states that in order for a chemical reaction to occur, particles must collide with sufficient energy to break the bonds of the reactant. If the energy is not great enough, the reaction will not occur.
Temperature If temperature of a reaction increases the rate of the reaction will increase because 1. Particles are moving faster 3. Particles have more energy therefore more of the collisions will be successful.
Acid + base = Salt + water
Acid + metal= Hydrogen + salt
Acid + carbonate= Water + carbon dioxide + salt
Metal + oxygen = Metal oxide
Metal + water = Metal hydroxide + Hydrogen
Copper Cu
Magnesium Mg
Zinc Zn
Aluminium Al
Iron Fe
Tin sn
Lead Pb
Silver ag
Gold Au
Calcium Ca
Sodium Na
Potassium K
Oxygen O
Hydrogen H
Carbon C
Sulphur S
Nitrogen N
Universal Indicator Used to indicate the pH of a solution-usually in a solution form
Salt Compound formed when a metal reacts with an acid
Compound A substance made up of different atoms bonded together
pH scale Used to indicate the pH of a substancce
Neutalise to make a pH of a solution equal 7
Hydroxide ions the ions released when alkalis dissolve in water
Hydrogen ions A positively charged hydrogen atom
Acidic solution A soultion with an excess of H ions
Litmus Turns from blue to pink or red when in an acidic soultion
Hydrogen Test Lighted stick makes this gas explode with a pop
Carbon dioxide test Clear lime water turns milky when shaken in this gas
Acid a chemical which releases H ions into solution - has a sharp, sour taste
Base A chemical which removes H ions from solution (have a soapy feel.)
Mercury Hg - A metal that is a liquid at room temperture
Oxygen O - A as that is flammable
Hydrogen H - A gas element that makes up 20% of the atmosphere
Silicon Si- A non-metal element that was used to make a computer chips
Iron Fe- An element that nails are made of
Caron C - the element that diamonds are made of
Chlorine Cl- A non-metal element used as a disinfectant in swimming pools
Aluminium Al - A metal element that is very light - good for plaanes
Copper Cu- A metal element that is used to make electrical wires
Gold Au- A precious metal used for jewellery
Uranium U - A radioactive element -used for nuclear fuel
Sulfur- S- a non-metal element that produces acid rain
The speed a reaction goes at is called rate of reaction
Increase the temperature- The atoms speed up and therefore are more likely to collide with others they have more energy.
Increase concentration- There are more atoms so more collisions
Increase surface area- There are more atoms available for collisions
Created by: kahn