GCSE Science

What do all acids contain and what is their pH? * H+ ions * pH is closer to 1 for strong acids and closer to 6 for weak acids What are the common ions? * nitrate

Law of conservation of energy * energy cannot be created or destroyed * it can only be transferred Common energy transfers * kinetic energy - in a moving object * gravitational potential - in a falling object

Definitions * exothermic reactions * energy is released to the surroundings * endothermic * energy is absorbed from the surroundings * activation energy * minimum energy needed to start a reaction Energy profile diagrams * x-axis * progress of reaction * y-axis