Chemistry Unit 2 GCSE Higher Cards!
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Charge of a Proton? | +1
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| What is a negative ion? | An anion
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| What is a positive ion? | A cation
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| 2 Giant Covalent structures? | Silicon Dioxide and Diamond
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| Giant covalent structures are ______ and ______ | Giant covalent structures are REGULAR and LARGE
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| Metals could be considered a ______ of metal ____. | Metals could be considered a LATTICE of metal ATOMS.
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| What 'holds' a metallicaly bonded structure together? | Strong intermolecular forces between the poisitivly charged ions and the negative 'sea' of electrons
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| What is the definition for the 'sea' of electrons? | Delocalised Electrons
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| Ionic substances have a ___ melting point because of ____ forces between ______ ______ _____. | Ionic substances have a HIGH melting point because of STRONG forces between OPPOSITELY CHARGED IONS.
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| Ionic solutions are ______. | Ionic solutions are CONDUCTIVE. (Will carry electricity)
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| Negativly charged ions go to the _____? | They go to the ANODE.
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| Positivly charged ions go to the ____? | They go to the CATHODE.
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| What is Oxidation/Reduction? (Remember Mr. Penrose) | It is Loss/Gaining of Electrons - OILRIG or LEO the lion says GER.
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| Will a : - ionic SOLID conduct electricity? - Molten ionic compound conduct electricty? - Ionic compound in solution conduct electricty? | - No (Fixed Ions)
- Yes (Free Electrons)
- Yes
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| The forces that hold together covalent bonds are equally as strong in ____ compounds as in _____ compounds. | The forces that hold together covalent bonds are equally as strong in COVALENT
compounds as in IONIC compounds.
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| The bonds between each different molecule in a covalent compound are very weak. This is called what? | Having weak inter-molecular forces.
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| 3 Special properties of diamond? | It is very hard, has high melting/boiling points and is very chemically
unreactive
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| ____ number - ____ number = Neutron number | MASS number - ATOMIC number = Neutron number
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| An isotope has differing amounts of what? | Neutrons
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| Different amounts on Neutrons can make it what? | Radioactive (Uranium-235 and Plutonium-239, P2 Revision Baby!)
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| Empirical formula when 9g of Al reacts with 35.5g of Cl? | AlCl3
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| How is yield calculated? | Useful Product / Maximum Possible (x100 for %age)
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| How is atom economy calculated? | Useful Relative formula Mass/ Total Relative formula Mass
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| What's the name of a reaction that could go 'Both Ways'? | A Reversible Reaction
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| Where is nitrogen and Hydrogen obtained from for the Haber Process? | The Air, and Methane respectively.
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| What type of catalyst is used in the Haber Process? | an Iron One
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| What Pressure and What temperature is used in the Haber Process? | 200 Atms and 450C
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| How is ammonia removed from the resulting mixture? | the gases are cooled - and Ammonia turns into a liquid.
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| What happens to the remaining gases? | They are returned into the system (recycled)
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| Whats the equation of the Haber Process? | N2 +3H2 <-> 2NH3
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| 3 ways collison theory can be used? (By doing this ____ - the particles do this - which makes More product/a faster reaction) | - Increased temperature = Faster particles = More collisions
-Surface Area = More area for collisions to happen
-Increased Pressure (Gases) / Concentration (Liquids)
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| What does an exothermic reaction do? | Give out heat to the surroundings.
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| What does the electrolysis of brine produce? | - Hydrogen (At the positive electrode)
- Chlorine (At the Negative Electrode)
- This leaves behind Sodium (Na+ and Hydroxide ions(from the water)) to produce Sodium Hydroxide - A Strong Alkali
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| A pH of 8-14 makes a substance what? | Alkaline
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| What is a base? | A Substance that will neutralise an acid.
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| Acid + Metal = ? | Salt + Hydrogen
(With any element above Hydrogen in the reactivity series) (The most reactive elements are too dangerous to be done (E.g. Potassium + Caesium)
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| Acid + Base = ? | Salt + Water
(Bases are metal oxides or metal hydroxides)
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| Acid + Alkali = ? | Soluble Salt + Water
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| How is an insoluble salt made? | Mix two soluble salts that contain the correct ions - Such as LEAD Nitrate and Potassium IODIDE - To form LEAD IODIDE - A precipitate that could be filtered and Dried
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| Ammonia Solution can be used to make what? | Ammonia Nitrate - A Fertilizer
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