Chemisty 2&3 0.0 / 5 ? ChemistryAll hard parts of c2 and c3GCSEAQA Created by: IT4335Created on: 02-06-17 11:39 How many other carbon molecules is each carbon molecule bonded with in a diamond 4 1 of 30 What can graphite conduct heat and electrisity 2 of 30 Why can graphite layers slide over each other weak inter molecular forces 3 of 30 why can graphite conduct heat and electrisity a delocalised electron is present 4 of 30 What controls the rate of reaction catalyst, temperature, concentration, pressure, surface area, 5 of 30 why does temperature increase the rate of reaction particles have more energy 6 of 30 how does pressure and concentration affect the rate of reaction colllison theory more particles in a smaller amount of space 7 of 30 how does the presence of a catalyst effect the rate of reaction they lower the activation energy 8 of 30 what is an exothermic reaction reactons that transfer energy to the surroundings 9 of 30 what is an endothermic reaction reactions that take in energy from surroundings 10 of 30 What are examples of an endothermic reaction thermal decomosition 11 of 30 why do endothermic reations occur more bonds are broken than made 12 of 30 what are examples of exothermic reactions combustion oxidation and neutralisation 13 of 30 why do exothermic reactions occur less bonds are broken than made 14 of 30 acid + metel= salt + hydrogen 15 of 30 acid+ base= salt+ water 16 of 30 acid + alkali= salt + water 17 of 30 Why is cryolite used in the electrolisis of aluminium to lower the boiling point 18 of 30 what can gaining electrons be callled in electrolosis reduction 19 of 30 Why is electroplating used to make a product more appealing to prevent corroding, increase hardness of the surface, reduce cost 20 of 30 Why is mendeleevs periodic table better he left gaps for undiscoverd elements as well as putting them in order of protons 21 of 30 what determins an elements properties the number of electrons in the outer shell 22 of 30 what compounds make water hard ca2+ and mg2+ 23 of 30 what precipitate is formed when hard water reacts with soap scum 24 of 30 what happens when tempory hard water is heated scale is formed 25 of 30 what is a negative of scale the efficiency of heating is reduced 26 of 30 What are medical positives of hard water stronger teeth and bones lower risk of heart disease 27 of 30 how can you remove hardness from perminant hard water ion exchange colum and adding washing soda 28 of 30 how do you remove hardness from temporary hard water heating 29 of 30 disadvantages of using hydrogen as a fuel supply storage and safety 30 of 30
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