List of pH Value of Different Substances:



 

List of pH Value 

pH is really a measure of the relative amount of hydrogen and hydroxyl in a water solution. Water that has more free hydrogen ions is acidic, whereas water that has more hydroxyl ions is basic. pH is measured on a scale of 0–14. On the pH scale, zero indicates extreme acidity, 14 indicates extreme alkalinity and 7 indicates a neutral state. At 25° C the pH of pure water is very close to 7. Acids have a pH less than 7 while bases have a pH greater than 7.
pH stands for potential hydrogen with the “p” meaning potential and the “H” standing for hydrogen. The pH scale is a scale that is used to rank the relative basicity or acidity of substances to other substances, based on the amount of hydrogen ion activity in a substance.

  

SubstancepH Value
Battery acid1.0
Limes1.8-2.0
Lemon juice2.2-2.4
Fruit jellies2.8-3.4
Vinegar2.9
Apple juice2.9-3.3
Strawberries3.0-3.5
Orange juice3.7
Tomatoes4.0-4.5
Bear4.5
Coffee5.0
Tea5.5
Rainwater5.6-6.0
Peas5.8-6.4
Urine6.0
Corn6.0-6.5
Butter6.1-6.4
Cow’s milk6.4
Maple syrup6.5-7.0
Human saliva6.5-7.5

Water7.0
Human blood7.3-7.5
Seawater7.5-8.5
Egg whites7.6-8.0
Baking soda8.3
Borax9.2
Milk of magnesia10.5
Laundry ammonia11.0
Lime water12.0

Why pH is not more than 14?

As you all know, we measure the pH of all of the samples in water. And the reaction of water is
H+ + OH- ——> H20
In this equilibration constant kw is
[H+] [OH-] = Kw = 1 X 10^-14
By applying -log on both sides
-log [OH-] – log [H+] = 14
You know pH= – log [H+]
Therefore, pH = 14 – (-log [OH-])

You can see from this equation that the higher than a concentration of OH- ions, the lower the value of -log [OH-]. If the concentration of OH- ions reaches 1 mol/dm3, the value of -log [OH-] is zero, which, according to the equation, gives pH=14.0.
However, if the concentration of OH- ions exceeds 1 mol/dm3 (which is very rare), the value of -log [OH-] would be negative, which, according to the equation, gives a pH of greater than 14.0.

Therefore, the pH range does not necessarily have a maximum of 14.0, since there is no limit to the concentration of a base.

9.9pH, Lime - 8.2pH, Avocado - 15.6pH, Garlic - 13.2pH, Mango - 8.7pH, Tangerine - 8.5pH, Pineapple - 12.7pH and Orange - 9.2pH

                            

Comments

Post a Comment

Popular posts from this blog

spreadsheet in excel

Image
What is a Spreadsheet A spreadsheet is a file that exists of cells in rows and columns and can help arrange, calculate and sort data. Data in a spreadsheet can be numeric values, as well as text,  formulas ,  references  and  functions . Rows, columns and cells in a spreadsheet The rows in a spreadsheet have numeric names (1, 2, 3 etc) and the columns have alphabetic names (a, b, c etc), thus the names of cells subsequently exist of a letter and a number that conveniently point out their position in the grid Selection of a row In the image above row 3 is selected. This can be done by clicking on the number 3 in front of the row. Selection of a column In the image above column B is selected. This can be done by clicking on the letter B above the column. Selection of a cell In the image above cell B3 is selected. This can be done by clicking on the cell. Worksheets A spreadsheet can contain one or several worksheets (tabs). Adding worksheets can be done by clicking the...
Read more

vocab

Image
       Meaning vocabulary is a term that describes how people learn the meaning of words. Children can learn the meanings of words by using context clues, word part instruction and graphic organizers. Meaning vocabulary entails words for which their meanings are understood and it is an important component of comprehension. Direct instruction in meaning vocabulary is essential. If vocabulary is not developed, children will be unprepared to handle vocabulary demands of content-area subjects. Its significance is also displayed in comprehension and interaction with others. Meaning vocabulary helps to build social skills, confidence and self-esteem in children. It also enables children to use context clues to decipher word meaning. It helps children to construct more interesting stories and to communicate effectively with their peers and just about anyone with whom they interact. The more words they know, the more aptly they will be able to communi...
Read more

Image
The Gds Vocabulary For All Competitive Exams | daily update 08/06/2022(Wednesday -09:05 pm) 📰 1. UNRAVEL (VERB): : solve Synonyms:  resolve, work out Antonyms:  complicate Example Sentence: They were attempting to unravel the cause of death. 2. NURTURE (VERB): : bring up Synonyms:  take care of, look after Antonyms:  neglect Example Sentence: I was nurtured by his parents in a close-knit family. 3. MALIGNANT (ADJECTIVE): : spiteful Synonyms:  hostile, malevolent Antonyms : benevolent Example Sentence: He is now in the hands of malignant fate. 4.RAMSHACKLE (ADJECTIVE): : tumbledown Synonyms:  dilapidated, derelict Antonyms:  well maintained, sturdy Example Sentence: It has a slightly ramshackle atmosphere, which adds to the charm 5. SPARK (VERB): : cause Synonyms:  give rise to, set in motion Antonyms:  bring to an end Example Sentence: The meeting sparked a row of rumours. 6. EQUITABLE (ADJECTIVE): : fair Synony...
Read more