An investigation was conducted to study the effect of the concentration of a reactant on the (trial) time need to complete a chemical reaction. Four trials of the same reaction were performed.In each trial the initial concertration of the reactant was different. The time needed for the chemical reaction to be complete was measured.State the effect of the concertration of the reactant on the rate of the chemical reaction.

To determine the effect of the concentration of a reactant on the rate of a chemical reaction, you can analyze the results of the investigation. Since four trials were conducted with different initial concentrations of the reactant, you can compare the time needed for the reaction to be complete in each trial.

To state the effect of the concentration of the reactant on the rate of the chemical reaction, you should observe the trend in the data. If the time needed for the reaction to be complete decreases as the concentration of the reactant increases, it indicates that increasing the concentration of the reactant leads to a faster reaction. This suggests a positive correlation between reactant concentration and reaction rate.

On the other hand, if the time needed for the reaction to be complete remains relatively constant regardless of the concentration of the reactant, it suggests that the concentration of the reactant does not significantly affect the reaction rate. In this case, there is no clear correlation between reactant concentration and reaction rate.

Therefore, by examining the data from the four trials and comparing the time needed for the reaction to be complete at different reactant concentrations, you can determine the effect of the concentration of the reactant on the rate of the chemical reaction.