C2 0.0 / 5 ? ChemistryAllGCSEAQA Created by: callumsmith69Created on: 05-05-14 21:35 What is ionic bonding? The transfer of electrons. 1 of 33 What do ionic compounds always have? Giant ionic lattices. 2 of 33 Name three properties of ionic compounds. High melting/boiling point and carry electric current. 3 of 33 What is covalent bonding? Sharing of electrons. 4 of 33 What are the two types of covalent structures? Simple molecular substances and giant covalent structures. 5 of 33 Give two examples of a giant covalent structure. Diamonds and graphite. 6 of 33 What are fullerenes? Molecules of carbon shaped in a hollow ball or closed tubes, the carbon atoms are hexagonal rings. 7 of 33 Where can fullerenes be used? In nanoparticles/nanotubes. 8 of 33 What kind of forces are in thermosoftening ploymers? Weak intermolecular forces with no cross links. 9 of 33 How is low density polythene made? Heating ethene to about 200 degrees at high pressure. 10 of 33 What is the relative formula mass (Mr)? Atomic mass in a compound added up. 11 of 33 What is a mole? The relative formula mass of a substance in grams. 12 of 33 How do you work out percentage of an element in a compound? Relative atomic mass (of the element) divided by Realtive formula mass of the whole compound times 100. 13 of 33 What is a reversible reaction? A reaction where the products can themselves react to produce the reactants. 14 of 33 What 4 thins effect the rate of a reaction? Temperature, concentration, surface area (of solids) and catalyst. 15 of 33 What is a base? A substance with a ph above 7 16 of 33 What is an alkali? A base dissolved in water. 17 of 33 What ions do acids form in water? H+ 18 of 33 Acid + Metal ---> ? Salt +hydrogen. 19 of 33 What salts are produced by hydrochloric acid? chloride salts. 20 of 33 What salts are produced from sulfuric acid? Sulfate salts. 21 of 33 Acid + Metal Hydroxides/oxides --> ? Salt + Water. 22 of 33 What salt would you get from a reaction between hydrochloric acid and copper oxide? Copper chloride (+Water). 23 of 33 What does OILRIG stand for? Oxidation is loss reduction is gain. 24 of 33 What kind of substances are used in electrolysis? Ionic substances that are molten or dissolved. 25 of 33 What are the positive and negative electrodes called? Positive is anode and negative is cathode. 26 of 33 Why is electrolysis of table salt (sodium chloride) solution useful? It produces hydrogen, chlorine and Sodium hydroxide. 27 of 33 Name one use of hydrogen and one use of chlorine. Hydrogen can be used in the haber process and chlorine can be used in water treatment. 28 of 33 Why is aluminium oxide mixed with molten cryolite? Lower the melting point from 2000 degrees to 900 degrees which is cheaper. 29 of 33 What is the half equation of the negative electrode (electrolysis of aluminium)? Al3+ + 3e- ---> Al 30 of 33 What is electro plating and why might it be used? Using electrolysis to coat the surface of a metal with another metal. Can be used for decoration or conduction. 31 of 33 What is the liquid that conducts electricity in elctrolysis? The electrolyte. 32 of 33 Why must the electrolye contain free ions? They conduct electricity which completes the circuit. 33 of 33
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