EDEXCEL HIGHER GCSE 9-1 CHEMISTRY PAPER 2

EDEXCEL HIGHER GCSE 9-1
CHEMISTRY PAPER 2
 complete combustion - correct-answers-hydrocarbon + oxygen ->
carbon dioxide + water

occurs when there is enough oxygen
more energy is released
incomplete combustion - correct-answers-hydrocarbon + oxygen -> carbon
monoxide + carbon + water

happens when there is not enough oxygen
less energy is released
Bromine - correct-answers-Br2
Sulfuric Acid - correct-answers-H2SO4
nitric acid - correct-answers-HNO3
Phosphoric Acid - correct-answers-H3PO4
calcium carbonate - correct-answers-CaCO3
iron oxide - correct-answers-Fe2O3
Carbonate ion - correct-answers-CO3 2-
Nitrate ion - correct-answers-NO3 -
sulphate ion - correct-answers-SO4 2-
oxide ion - correct-answers-O2-
Hydrogen Carbonate ion - correct-answers-HCO3-
Ammonium ion - correct-answers-NH4 +
bromide ion - correct-answers-Br-
formula for molarity - correct-answers-concentration = moles of solute/litres
of solution
alkene - correct-answers-double carbon bonds

general formula - C n H 2n
alkane - correct-answers-hydrocarbon, single bonds

general formula - C n H2n+2
endothermic / exothermic - correct-answers-endothermic - takes in energy
(cools down) bond breaking. if the bond energy is negative it is exothermic
exothermic - releases energy (heats up) bond making. if the bond energy is
positive it is endothermic
pollution due to combustion
-carbon dioxide
-sulfur dioxide
-nitrogen oxide - correct-answers-carbon dioxide - global warming
sulfur dioxide - acid rain