Chemistry 0.0 / 5 ? ChemistryAcids, bases and saltsGCSEAQA Created by: Amy CockingCreated on: 07-01-14 18:29 Define a compound. A substance which has two or more elements which are chemically bonded. 1 of 35 What bond forms with the sharing of electrons? Covalent bonding. 2 of 35 What bonding is formed with the transfering of electrons? Ionic bonding 3 of 35 Define Ion. A charged particle produced by the loss or gain of electrons. 4 of 35 What is the arrangement called of ionic bonds between charged particles. Giant lattice. 5 of 35 What is the overall charge on any ionic compound? 0 6 of 35 What is the charge on a sulphate? 2- 7 of 35 What charge is on a carbonate? 2- 8 of 35 What is the charge on a nitrate? - 9 of 35 What is the charge on a hydroxide? - 10 of 35 Give some examples of giant covalently bonded structures. Diamond, graphite and silicon dioxide. 11 of 35 What are the properties of metallic bonding? A sea of delocalised electrons and a strong electro-static attraction. 12 of 35 Do ionic compounds have high or low melting points? A high melting point. 13 of 35 What is the state of ionic solid? It cannot move, but it can vibrate. It keeps a solid structure, and cannot conduct electricity. 14 of 35 What is the state of a molten ionic compound? It can move freely,and can conduct electricity. 15 of 35 What is the state of an ionic compound in an ionic solution? It can conduct electricity and can move freely in the water. 16 of 35 Do simple covalently bonded structures have high or low melting point. Low 17 of 35 What is the properties of diamond and silicon dioxide? High melting point, high boiling point, hard, cant conduct electricity and is soluble. 18 of 35 Properties of graphite. Slide easily because there are no covalent bonds between the layers. Can conduct electricity with delocalised free electrons. Soft. 19 of 35 What is an alloy? Usually a mixture of , such as bronze (copper and tin) 20 of 35 What are the conditions for low density poly-ethene? High pressures and a trace of oxygen. 21 of 35 What are the conditions for high density poly-ethene? Slightly raised pressure, a catalyst and 50 degrees. 22 of 35 What are the 3 sub-atomic particles and their relative mass? Protons = 1 Neutron = 1 Electron = Negligible. 23 of 35 Define isotope. Atoms of the same element with a different number of neutrons. 24 of 35 What is the equation for percentage yield. (Produced Produced / Total amount of product possible) *100 25 of 35 An example of a reversible reaction. Haber process or freezing water 26 of 35 Give an analysis technique that is used to detect food additives. Chromatography. 27 of 35 Define retention time. The time it takes for a component in a mixture to pass through the column during gas chromatography. 28 of 35 What analysis is used to find the relative molecular mass of a compound? Mass Spec 29 of 35 What is the peak called that gives the relative molecular mass of a compound? Molecular iron peak. 30 of 35 How do you work out rate of reaction? Amount of product formed / time. 31 of 35 What 4 factors affect the rate of chemical reactions? Concentration of substance, temperature, catalyst and surface area. 32 of 35 What is a reversible reaction? A reaction where elements A+B = C+D and then C+D = A+B. 33 of 35 Is ammonia nitrate + water an endothermic reaction or an exothermic reaction? Endothermic Reaction 34 of 35 Give two examples of exothermic reactions. Burning fuels and respiration. 35 of 35
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