This rate is 12 inches per foot. Measure the temperature of 50 mL of 2M HCl and add to the conical flask and quickly put the cork on the flask. Low body temperatures slow down metabolism. In a reaction where both reactants are in low concentrations the particles are spread out and will collide with each other less often resulting in fewer successful collisions. Some reactions take hundreds, maybe even thousands, of years while others can happen in less than one second. //