To determine how increasing the concentration of the reactants affects the reaction rate, let's analyze the given data table:
\begin{tabular}{|c|c|}
\hline
Conditions & Reaction Time [tex]$(s)$[/tex] \\
\hline
Original & 10 seconds \\
\hline
Higher concentration & 5 seconds \\
\hline
Higher temperature & 5 seconds \\
\hline
Metal added & 5 seconds \\
\hline
\end{tabular}
The original condition has a reaction time of 10 seconds. Now, let's focus on the row where the concentration of the reactants is increased:
- Under the condition of higher concentration, the reaction time is reduced to 5 seconds.
Reaction time is inversely proportional to the reaction rate. This means that a shorter reaction time indicates a higher reaction rate, and a longer reaction time indicates a lower reaction rate.
Given that the reaction time decreases from 10 seconds to 5 seconds when the concentration is increased, the following statements can be made:
- The reaction time has decreased.
- When the concentration of reactants is increased, the reaction completes in less time.
These observations indicate that increasing the concentration of the reactants speeds up the reaction, thus increasing the reaction rate.
Therefore, the correct conclusion is:
A. Increasing the concentration increases the reaction rate.
