EduPedo's video: 4 Table 2 2 l 10 l l Class 10 Science Chapter 2

3 Table 2.2 अम्ल क्षारक और लवण lकक्षा 10 विज्ञान l लवण और उनके उत्पाद l Class 10 Science Chapter 2 बाकि सारी विडियो यहाँ है: https://www.youtube.com/watch?v=flaqIUNBVes&list=PLcF_DlOFvzVGa_68IaoVyTDEylUdiEMg0 pH values of the common substance from our daily life Solution pH Solution pH Conic HCl 0 Saliva (before meal) 7.4 Oil HCl 1.0 Saliva (after meal) 5.8 Gastric Juice 1.4 Blood 7.4 Lemon Juice 2.5 Eggs 7.8 Vinegar 4.0 Toothpaste 8.0 Tomato Juice 4.1 Baking Soda Solution 8.5 Coffee 5.0 Washing Soda Solution 9.0 Soft Drink 6.0 Milk of Magnesia 10.5 Milk 6.5 Household Ammonia 11.6 Pure Water 7.0 Dilute Sodium Hydroxide 13.0 Concentrated Sodium Hydroxide 14 Things to remember about pH Value and concentration An acid solution having low pH is stronger than another solution having higher pH values. A solution having a pH of 2 is stronger than a solution having a pH of 5. An alkali solution having a higher pH value is stronger than a solution of pH 10. Very Strong acids solution can have pH values less than zero and very strong basic solutions can pH greater than 14. Which acid is used to peel ginger skin and how it affects health? Universal Indicator of color at pH scale Importance of pH In Agriculture: By determining the pH of the soil. We can find whether it is acidic or alkaline. This helps in deciding the type of fertilizer to be used and the types of crops to sow. In the Biological process: By knowing pH we can adjust the medium of biological processes like fermentation, enzyme hydrolysis, sterilization, etc. In corrosion research: By measuring the pH of sea-water, the effect of alkaline sea-water on the material used for building ships and submarines is studied. Buffer Solution A Buffer Solution or a buffer is defined as a solution whose pH does not change when a small amount of an acid or base is added in it. It is used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications. Many life forms thrive only in a relatively small pH range so they utilize a buffer solution to maintain a constant pH. In nature, the bicarbonate buffering system is used to regulate the pH of the blood. The solution of Sodium Acetate and Acetic acid is an example of an effective buffer solution. The solution in which buffer solution is accommodated that works like an extremely slow acid.