Final answer:
To distinguish between a neutral solution like water and a strong acid solution like battery acid, you should test their pH level. Water has a pH of 7, while a strong acid has a pH lower than 7.
Step-by-step explanation:
To differentiate a neutral solution like water from a strong acid solution like battery acid, you would test their pH level. A neutral solution such as pure water has a pH of 7, which means that it has a balanced concentration of hydronium ions and hydroxide ions. On the other hand, a strong acid such as battery acid has a pH lower than 7, indicating a higher concentration of hydronium ions.
When it comes to testing solutions, it's important to use safe practices. Options like testing their smell and taste are not safe methods, especially for strong acids or bases that can be harmful. For scientific accuracy and safety, pH testing is the most appropriate method. This can be done using pH paper, a pH meter, or an indicator, such as phenolphthalein, which changes color based on the acidity or basicity of the solution.