pH Flashcards
pH stands for _______
power/potential of hydrogen
is a quantitative measure of the acidity and alkalinity of liquid solutions.
pH
pH is measured on a scale of ______
0 to 14
Low pH corresponds to what?
high concentration of H
High pH values correspond to what?
low concentration of H
true or false: pH is directly related to the ratio of H and OH solutions
true
The pH of the human body ranges between _______
7.35 to 7.45,
Average pH of human body with the absence of pathological state
7.40
This pH level (7.40) is ideal for many biological processes, one of the most important being the ______
oxygenation of blood
caused by an overproduction of acid that builds up in the blood or excessive loss of bicarbonate from the blood (metabolic acidosis)
Acidosis
Caused by a buildup of carbon dioxide in the blood the result from poor lung function or depressed breathing
Acidosis
a condition in which the body fluids have excess base (alkali).
Alkalosis
This is opposite of excess acid (acidosis).
Alkalosis
What makes the body too alkaline?
decreased carbon dioxide or increased bicarbonate
an increase in the hydrogen ion concentration of the blood, resulting in a decrease in pH.
Acidemia
a decrease in the hydrogen ion concentration in the blood, resulting in an increase in pH.
Alkalemia
A pH level can be measured by using?
pH strips/paper
pH indicator
pH meter
methods of pH determination
Electrometric method
colorimetric method
based on the property of acid-base indicator dyes, which produce color depending on the pH of the sample.
Colorimetric method
Colorimetric method: The color change can be measured as an absorbance change _________
Spectrophotometrically
is a chemical added in a small amount to a solution that causes a color change depending on the pH.
pH indicator or acid-base indicator
True or false: an indicator shifts color at precise pH of hydrogen
False
True or False: an indicator color change occurs over a range of hydrogen ion concentration
true
Titrate a weak acid using an indicator that ____________
changes under slightly alkaline solutions
Titrate a weak base using an indicator that ___________
changes color at a slightly acidic pH
When titrating strong acids or bases, aim for a pH indicator that ________
displays color change near a neutral pH
a method used to determine the pH level of a sample using ion-sensitive electrodes.
Electrometric method
a laboratory equipment being used to measure the acidity or alkalinity of a solution.
pH meter
pH meter measures the concentration of hydrogen ions using an ___________
ion-sensitive electrodes
It is the most reliable and convenient method for measuring pH
pH meter
