Which has a pH over 7?
A. Orange juice
B. Vinegar
C. Baking soda
D. Water
The Correct Answer and Explanation is :
The correct answer is C. Baking soda.
Explanation:
pH is a measure of how acidic or basic a solution is, on a scale ranging from 0 to 14. A pH of 7 is considered neutral, which means the solution is neither acidic nor basic. Solutions with a pH less than 7 are classified as acidic, while those with a pH greater than 7 are considered basic (or alkaline).
- Orange Juice: The pH of orange juice typically ranges from about 3 to 4, making it acidic. The acidity in orange juice comes from citric acid, which is a natural component of citrus fruits. This high acidity contributes to the tangy flavor of orange juice and can also affect its preservation.
- Vinegar: Vinegar generally has a pH of around 2 to 3, indicating it is highly acidic. The main component of vinegar is acetic acid, which gives it its sharp taste and is commonly used in cooking, cleaning, and food preservation.
- Baking Soda: Baking soda, or sodium bicarbonate, has a pH of around 9 to 10, classifying it as a basic substance. It is often used in baking as a leavening agent and can neutralize acids, which is why it is a common ingredient in recipes that include acidic components. The basic nature of baking soda also makes it useful in various household cleaning applications, where it can effectively remove stains and odors.
- Water: Pure water has a neutral pH of 7. While it can act as a solvent for various substances, its pH does not indicate acidity or alkalinity without the presence of dissolved substances.
In summary, among the options provided, only baking soda has a pH over 7, making it basic.