Lab Quiz

Question 1

pH

Answer 1

Measure of the concentration of hydrogen ions in a solution

Question 2

Why is pH important

Answer 2

Biological systems because most organisms can only survive within a narrow pH range

Question 3

pH scale

Answer 3

Measures acidity or alkalinity of a solution on scale from 1 to 14
pH less than 7 indicates acidity
pH of 7 is neutral
pH greater than 7 alkalinity

Question 4

Equation and calculation

Answer 4

pH is calculated using the equation pH=-log[H+] where [H+] is the concentration of hydrogen ions in moles per liter

Question 5

Applications of the pH scale

Answer 5

Include testing water quality, soil pH for agriculture, human blood pH in medicine, and controlling the acidity of food and beverages

Question 6

Buffers

Answer 6

Substances that help regulate pH within certain limits
A buffer resists a change in pH by accepting or donating hydrogen ions in solution
(Phosphate, bicarbonate, hemoglobin, and serum proteins)