PH SCALE AND DETAILS ABOUT BLOOD GROUP

WHAT IS PH SCALE ?

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,

PH Value is a measure of how acidic or basic a chemical is when it’s in aqueous (water) solution. A neutral pH value (neither an acid nor a base) is 7. Substances with a pH greater than 7 up to 14 are considered bases. Chemicals with a pH lower than 7 down to 0 are considered acids. The closer the pH is to 0 or 14, the greater its acidity or basicity, respectively

PH VALUE OF DIFFERENT SUBSTANCE

List of pH Value of Different Substances:

Substance	pH Value
Battery acid	1.0
Limes	1.8-2.0
Lemon juice	2.2-2.4
Fruit jellies	2.8-3.4
Vinegar	2.9
Apple juice	2.9-3.3
Strawberries	3.0-3.5
Orange juice	3.7
Tomatoes	4.0-4.5
Bear	4.5
Coffee	5.0
Tea	5.5
Rainwater	5.6-6.0
Peas	5.8-6.4
Urine	6.0
Corn	6.0-6.5
Butter	6.1-6.4
Cow’s milk	6.4
Maple syrup	6.5-7.0
Human saliva	6.5-7.5
Water	7.0 .

Some thing about blood group ?

About blood groups

A blood type (also called a blood group) is a classification of blood, based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells (RBCs). These antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system.
blood types were discovered by Karl Landsteiner in 1901, for which he received the Nobel Prise in Physiology or Medicine in 1930.

In transfusions of packed red bloodcells, individuals with type O Rh D negative blood are often calleduniversal donors. Those with type AB Rh D positive blood are calleduniversal recipients. ... The antibodies will attack the antigens on any otherblood 

Table of blood Donner and receiver

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