design and conduct an investion to find out whether the amount of heat produced will depend on increase on concentration of Hcl when Hcl reacts with an excess zn.hint...you may investigate either the amount of heat produced or the amount of gas produced(make choice from the start to avoid confusion and write your topic accordingly).you are also not restricted to Hcl and zn as reactants only,you may decide to use your own choice of reactants but check if the reaction is exothermic for heat produced
To investigate whether the amount of heat produced is dependent on the increase in concentration of HCl when it reacts with an excess of Zn, you can design an experiment to measure the heat change during the reaction. Here's a step-by-step guide on how to conduct this investigation:
1. Select your reactants: In this case, we will continue using HCl and Zn as the reactants since Zn reacts with HCl to produce an exothermic reaction. This reaction is also commonly known as the "Zinc and Hydrochloric Acid" reaction.
2. Set up a calorimeter: A calorimeter is a device used to measure the heat change during a chemical reaction. Prepare a styrofoam cup and a thermometer to create a simple calorimeter. Insulate the cup as much as possible to minimize heat exchange with the surroundings.
3. Measure the starting temperature: Fill the styrofoam cup with a known volume of the desired concentration of HCl solution. Measure and record the initial temperature of the HCl solution using the thermometer.
4. Add zinc: Add a known amount of excess zinc metal to the HCl solution in the styrofoam cup. Stir the mixture gently to ensure proper mixing.
5. Observe and record: As the reaction takes place, monitor the temperature change occurring in the calorimeter. Record the highest or lowest temperature reached by the reaction mixture. Note that an exothermic reaction will release heat, resulting in an increase in temperature.
6. Repeat with different concentrations of HCl: Repeat this experiment with different concentrations of HCl solution. You can prepare solutions with increasing concentrations, such as 0.1 M, 0.2 M, 0.3 M, and so on. Always maintain the excess of zinc in each experiment to ensure it is not limiting the reaction.
7. Analyze and interpret the data: Once you have collected the data for each concentration of HCl, analyze the results to identify any correlation between the concentration of HCl and the heat change (temperature increase). If the increase in the concentration of HCl leads to a higher temperature increase, it would suggest that the amount of heat produced is dependent on the HCl concentration.
Remember, throughout the experiment, ensure that you are consistent with the volumes of reactants used, temperature measurements, and any other variables that might influence the heat change.
Note: Conducting experiments with chemicals should be done under appropriate safety precautions. Make sure to wear safety goggles, gloves, and work in a well-ventilated area. Consult with a chemistry instructor or a trusted professional before attempting any experiments.