The reaction of solid sodium hydrogen carbonate and hydrochloric acid is an example of an endothermic reaction. Suppose that the initial temperature of the system is 27°C. How do you expect the temperature to change as the reaction progresses?

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.