Three groups of drugs are used to reduce the stickiness of platelets, thus preventing platelets from clumping together to form platelet plugs. The anti-platelet drugs are most effective in preventing abnormal blood clots from forming in arteries (as opposed to veins). Aspirin and dipyridamoleâ (Aggrenox).
In order to react, colliding molecules must have a total kinetic energy equal to or greater than some minimum value [Figure 14.13(b)]. The minimum energy required to initiate a chemical reaction is called the activation energy, Ea. The value of Ea varies from reaction to reaction.
The particles in the hydrochloric acid and sodium thiosulphate need to. collide to react, this is called the collision theory; a minimum force. of collision is required for the reaction to take place; this is. called the activation energy. Collision Theory. The rate of a reaction depends on two factors.ydrochloric acid is a strong colourless acid formed when hydrogen. chloride gas dissociates in water, used in industrial and laboratory. processes. Hydrochloric acid is also produced in the stomach, where it. initialises the digestion of proteins.