Table of Contents
pH Value: In chemistry, historically pH denotes the “potential of hydrogen”, it is a quantitative measurement of the acidity or basicity of an aqueous solution. The pH scale indicates the concentration of hydrogen ions in the solutions. pH scale ranges from 0-14. If the pH scale is less than 7, it means the substance is acidic. If the pH level is 7, it means the substance is neutral, and if the pH scale is more than 7, it denotes the substance is a base. The litmus test is the indicator that determines whether the substance is acid or base. If the litmus turns the blue paper to red, it indicates the substance is acid whereas if the litmus turns the red paper to blue, it indicates the substance is base.
pH Values List
As we know pH value is the potential of hydrogen, that is, it measures the function of alkalinity or acidity in substances. As the pH value decreases, the acidity in the substance increases, and as the pH value increases, the basicity of the substance increases. Check out the list of chemical Substances and their pH value below in the table.
|pH Values List|
|2.||Gastric juice||1.0 – 3.5|
|3.||Soft drink||2.0 – 4.0|
|4.||Lemon Juice||2.2 – 2.4|
|8.||Fruit jellies||2.8- 3.4|
|9.||Apple juice||2.9 – 3.3|
|22.||Acid Rain||< 5.5|
|23.||Peas||5.8 – 6.4|
|25.||Fresh Milk||6.5- 6.7|
|29.||Pure Drinking Water||7|
|31.||Copper Sulphate||Greater than 7|
|32.||Sugar||More or less than 7|
GK Questions Related to pH Values
pH Value is measured by the pH scale which has a range from 0 – 14. If the pH value is less than 7, then the substance is acidic. If the pH value is 7, then the substance is neutral and when the pH value of the chemical substance is more than 7, then the substance is basic in nature. So let us know the ph value of common substances such as acid rain, human blood, common salt, Milk, Saliva, etc. Practice some GK Questions Related to pH Values from below section.
Q1. What is the pH Value of acid rain?
Ans. The pH value of acid rain is between 5.0-5.5, which is acidic. When rain combines with sulfur dioxide or nitrogen oxides produced by the burning of power plants and automobiles, the rain becomes much more acidic.
Q2. What is the pH Value of Blood?
Ans. The pH value of blood ranges between 7.34- 7.45 which is mildly basic in nature. When there is a rise in the alkaline condition is called alkalosis because the blood becomes too alkaline, whereas when the acidity in the blood increases, it is referred to as acidosis.
Q3. What is the pH Value of Pure Drinking Water?
Ans. Pure drinking water is 7, which is considered neutral, as it has neither acid nor base qualities.
Q4. What is the pH value of milk?
Ans. The pH value of fresh milk is 6.5 to 6.7, which means that it is slightly acidic in nature.
Q5. What is the pH value of Gastric Juice?
Ans. The pH value of gastric Juice ranges between 1.0-3.5, which is acidic in nature. Gastric juice has a unique combination of hydrochloric acid (HCl), lipase, and pepsin. The acidic gastric juice’s main function is to inactivate microorganisms.
Q6. What is the pH value of Saliva?
Ans. The pH value of saliva ranges between 6.2 to 7.6, The flow of saliva eliminates carbohydrates that could be metabolized by bacteria and removes acids produced by bacteria.
Q7. What is the pH Value of Lemon Juice?
Ans. The lemon juice ranges between 2.2 to 2.4, which means it is slightly acidic in nature. The higher the value of hydronium ion concentration, the lower the pH value.
Q8. What is the pH Value of Urine?
Ans. Urine is the nitrogenous waste released from the body, the pH value ranges between 4.5 to 8.0.
Q9. What is the pH Value of Vinegar?
Ans. The pH value of vinegar slightly ranges from 2 to 3, which makes the vinegar mildly acidic.
Q10. What is the pH Value of Battery Acid?
Ans. The pH value of the Battery acid is 1.0, Some batteries use acid in the chemical reaction to produce an electric current. An acid commonly used in battery acid is sulfuric acid, which is a strong acid.
Q11. What is the pH Value of Tomato Juice?
Ans. The pH value of Tomato Juice is 4.0, which is slightly acidic in nature. It contains acids such as citric acid, ascorbic acid, and malic acid giving it a low pH.
Q12. What is the pH value of Salt?
Ans. The pH value of salt is 7 which is neutral. Salts contains strong acid and strong base. Hence, salt does not get hydrolyze.
Q13. What is the pH value of Alcohol?
Ans. The pH value of alcohol is 7.33, it is a weak acid. Alcohol cannot be defined as acidic or alkaline, rather it is defined as amphiprotic because the nature of the bond between the carbon and hydroxyl group is non-ionic but slightly polar in nature.
Q14. What is the pH value of Baking soda?
Ans. Baking soda also known as sodium bicarbonate has a pH value of 9, which is basic in nature.
Q15. What is the pH value of Bleaching Powder?
Ans. The pH value of Bleaching Powder is 11, so it is considered to be basic in nature. It gives calcium chloride, chlorine, and water when reacted with hydrochloric acid.