Which of the following is considered acidic?
Lime water
Soap
vinegar
ammonia
Among the given options, vinegar is considered acidic.
The following options are considered acidic:
1. Vinegar: Vinegar is a common household acid that is typically made from the fermentation of ethanol by acetic acid bacteria. It has a sour taste and is commonly used for culinary purposes and cleaning.
Lime water, soap, and ammonia are not considered acidic.
2. Lime water: Lime water, also known as slaked lime or calcium hydroxide, is actually an alkaline substance. It is basic in nature and has a bitter taste.
3. Soap: Soap is typically a neutral substance and is not classified as acidic or basic. However, many commercial soaps have a pH level slightly above 7, making them slightly more alkaline than acidic.
4. Ammonia: Ammonia is a commonly used cleaning agent that is alkaline in nature. It has a pungent odor and is considered a base rather than an acid.
To determine which of the following substances is considered acidic, you can use a pH scale. The pH scale ranges from 0 to 14, where values below 7 indicate acidity, values of 7 indicate neutrality, and values above 7 indicate alkalinity or basicity.
To measure the pH of each substance, you'll need pH test strips, a pH meter, or pH indicator solution. Follow these steps:
1. Lime water: Take a sample of lime water and dip a pH test strip into it or use a pH meter to measure its pH. Lime water is typically alkaline or basic, so its pH will likely be greater than 7.
2. Soap: Since soap is typically mild and mostly composed of a mixture of fats and alkali, it is usually slightly basic with a pH around 8 to 9. However, different types of soap can have varying pH levels, so it's best to measure it using the same methods as mentioned above.
3. Vinegar: Vinegar is known for its acidic properties. It typically has a pH range of 2 to 3. To confirm its acidity, take a pH test strip or pH meter and measure the pH of the vinegar.
4. Ammonia: Ammonia is a basic compound. However, it's essential to note that ammonia can also exist as ammonia gas, which is highly alkaline. For household ammonia, which is typically an aqueous solution, the pH may range from 11 to 12. To determine the pH, you can use the same methods as mentioned above.
Based on the pH values obtained from these substances, the one that falls below 7 on the pH scale will be considered acidic.