Observation Table of Class 9 Experimental Science Ch 9 Experiment No 9

Experiment No 9 in Chapter 9 of Class 9 Experimental Science deals with the "Effect of concentration on the rate of reaction." The experiment is conducted to determine how the concentration of a reactant affects the rate of a chemical reaction. The observation table is an essential component of the experiment as it records the observations made during the experiment. The observation table consists of two columns, namely the concentration of the reactant and the time taken for the reaction to occur.

Heading 1: Concentration of Reactant

The first column in the observation table records the concentration of the reactant. The concentration is measured in moles per liter (mol/L) and is varied for each trial of the experiment. The concentration of the reactant is an essential variable in the experiment as it determines the number of reactant particles available for the reaction to occur.

Heading 2: Time Taken for Reaction

The second column in the observation table records the time taken for the reaction to occur. The time is measured in seconds (s) and is recorded for each trial of the experiment. The time taken for the reaction to occur is an important variable in the experiment as it determines the rate of reaction. The rate of reaction is calculated by dividing the concentration of the reactant by the time taken for the reaction to occur.

Heading 3: Experiment Procedure

The experiment is conducted by mixing a fixed amount of reactants in a flask and measuring the time taken for the reaction to occur. The concentration of the reactant is varied for each trial of the experiment, and the time taken for the reaction to occur is recorded in the observation table. The experiment is repeated several times for each concentration of the reactant to obtain accurate results.

Heading 4: Analysis of Data

The data obtained from the observation table is analyzed to determine the effect of concentration on the rate of reaction. The rate of reaction is calculated for each concentration of the reactant, and a graph is plotted with concentration on the x-axis and the rate of reaction on the y-axis. The graph shows that the rate of reaction increases with an increase in the concentration of the reactant.

Conclusion

The observation table is an essential component of the experiment as it records the observations made during the experiment. The data obtained from the observation table is analyzed to determine the effect of concentration on the rate of reaction. The experiment shows that the rate of reaction increases with an increase in the concentration of the reactant. The observation table, therefore, plays a crucial role in the experiment by providing accurate data that can be analyzed to draw valid conclusions.

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