Question

A researcher collected data to see how the concentration of thiosulfate in water affects reaction time with hydrochloric acid. Which conclusion can the researcher draw?

A. As concentration increases, reaction time decreases.
B. There is no obvious mathematical relationship.
C. As concentration decreases, reaction time decreases.
D. As concentration increases, reaction time increases.

Answer 1

The conclusion a researcher can draw is that as thiosulfate concentration increases, reaction time with hydrochloric acid decreases due to an increase in reaction rate.

Step-by-step explanation:

When a researcher investigates how the concentration of thiosulfate affects the reaction time with hydrochloric acid, they are examining the relationship between reactant concentration and reaction rate. Based on the general principles of chemical kinetics, an increase in the concentration of a reactant typically leads to an increase in the rate of reaction. This is because a higher concentration means more particles are present, which increases the likelihood of successful collisions between reactant molecules, thus speeding up the reaction.

Therefore, the conclusion that the researcher can draw is: A. As concentration increases, reaction time decreases. This implies that with higher concentrations of thiosulfate, the reaction with hydrochloric acid will occur more rapidly, thereby reducing the overall reaction time.