In the experiment using plastic caps with distilled water, lemon juice/hydrochloric acid, caustic soda/potassium iodide, and sugar, what is the MOST likely purpose of including the... In the experiment using plastic caps with distilled water, lemon juice/hydrochloric acid, caustic soda/potassium iodide, and sugar, what is the MOST likely purpose of including the sugar solution?
Understand the Problem
The question is asking us to identify why a sugar solution would be included alongside acids, bases and distilled water in an experiment. The key here is understanding the properties of sugar in solution and what it would be useful for in a comparative experiment.
Answer
The sugar solution is included as a negative control to show that not all solutions conduct electricity.
The sugar solution is most likely included to act as a negative control. It helps to demonstrate that not all solutions conduct electricity, especially those with covalent compounds that do not readily dissociate into ions in the water.
Answer for screen readers
The sugar solution is most likely included to act as a negative control. It helps to demonstrate that not all solutions conduct electricity, especially those with covalent compounds that do not readily dissociate into ions in the water.
More Information
A negative control is a sample that should not produce a response in the experiment. This helps to confirm that the experimental results are due to the variable being tested and not to some other factor.
Tips
A common mistake is to assume all aqueous solutions will conduct electricity.
Sources
- Chapter 11 Chemical Effects of Electric Current - SATHEE SSC - sscexamguide.prutor.ai
- [PDF] Experiment 1 - AquaEnergy Expo Knowledge Hub - kh.aquaenergyexpo.com
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