pH and pOH Flashcards
What are electrolytes?
Substances that dissolve in water to give a solution that conducts electricity.
True or False: Electrolytes are solutions of acids, bases or salts.
True.
Electrolytes are also called _______________.
Ionic solutions
What are the common ions found in our body?
K+, Na+, Mg+, Ca+, Cl-, HPO4(2-), HCO3(1-)
What are concentrated and dilute electrolytes?
Concentrated electrolytes- High concentration of ions.
Dilute electrolytes- Low concentration of ions.
What are strong and weak electrolytes?
Strong electrolytes- Dissociate completely in solution.
Weak electrolytes- Dissociate partially in a solution.
What is autoionization of water?
The self-ionization of water into H3O+ and OH- ions.
Pure water cannot conduct electricity. Why?
Because water molecules autoionize into a very small quantity of ions that cannot conduct electricity.
What is the ionic product (Kw) of water at 25 deg celsius?
Kw= [H30+] [OH-]= 10^-14
Why is the ionic product of water constant?
Kw does not depend on concentration; it is a temperature dependent solvent.
The ionic product of water will always be 10^-14, regardless of addition of acid or base.
Why is the pH of pure water 7.0?
Because the concentration of [OH-] and [H3O+] is equal. A pH of 7 is an indication of neutrality.
What is pH?
pH is a measure of acidity and alkalinity of the solution.
It stands for “Power of Hydrogen”
True or False: The pH of a solution is directly proportional to the [H3O+] concentration.
False.
What is the physiological importance of pH?
- Fluids like blood, saliva and urine have a pH related to their function.
- pH is regulated to maintain acid-base homeostasis.
- Enzymes work only under optimum pH.
What is the pH of blood?
7.4
