Solution chalk 0.1 m hcl water final concentration time (sec.) a 0.1g 5 ml 5 ml | 0.05 m b 0.1g 4 ml 6 ml | c 0.1g 3 ml 7 ml d 0.1g 2 ml 8 ml e 0.1g 1 ml 9 ml a. calculate the solution concentration for each of the hcl samples. the first one has been done for you. b. as the concentration of the hcl solution increased, did the speed of the reaction increase or decrease? c. therefore, as the concentration of a reactant increases, does the rate of the reaction increase or decrease? d. do your predictions previous to this investigation agree with your results? e. make a general rule about the effects of the concentration of reactants on reaction rates.