General Science: pH Concept, pH Value of Different Substances

pH Concept

                                                      

You have often heard that certain substances are acidic or basic in nature. What cause them to be acidic or baisc. How does one find out which substance is acidic, basic or neutral. All these things are determined with the help of a scale known as pH. Let's understand the pH concept.

pH stands for 'potential of Hydrogen' which measures the acidity or alkalinity of water-soluble subtances.

In 1909 S.P.L Sorenson, a Danish biochemeist devised a scale known as pH to represents the H^+ ion concentration of an aqueous solution. The pH value of any solution is a number that simply represents the acidity and basicity of the solution.

Observations:

• Substances  which have a pH value of 7 are neither basic nor acidic which means they're neutral in nature.

• Substances that have a pH value of less than 7 are acidic in nature.

• Substances that have a pH value of more than 7 are basic in nature.

List of pH Values of Some Ordinarily Substances

1. Pure Water - pH 7
2. Human Blood - pH  7.4
3. Milk - pH 6.5
4. Coffee - pH 5
5. Soft Drink - pH 6
6. Tomato Juice - pH 4.1
7. Lemon Juice - pH  2.3 - 2.4
8. Vinegar - pH 4
9. Human Urine - pH 5.5 - 7.5  (Average - 6)
10. Baking Soda Solution - pH 8.5
11. Washing Soda Solution - pH 9
12. Milk of Magnesia - pH 10.5
13. Acid Rain - pH 4
14. Battery Acid - pH 0
15. Stomach HCL - pH 1 - 1.5

Stay tuned with Exam Together. 

Learn: Scientific Name of Vitamins and Food Sources

SHARE IT WITH YOUR FRIENDS!

Prepare Well,

Exam Together

Photo by Markus Spiske on Unsplash