The PH of a Solution Is Given by the Formula $\mathrm { pH } = - \log \left[ \mathrm { H } ^ { + } \right] , \text {where } \left[ \mathrm { H } ^ { + } \right]$

question 116

Multiple Choice

The pH of a solution is given by the formula $\mathrm { pH } = - \log \left[ \mathrm { H } ^ { + } \right] , \text {where } \left[ \mathrm { H } ^ { + } \right]$ is the concentration of hydrogen ions in moles
per liter in the solution. Use this formula to
-Lower levels of pH indicate a more acidic solution. If the pH of solution A is 4.2 and the pH of solution B is 6.9, how much more acidic is solution A than solution B?

• A) -0.0000630 times as acidic
• B) 0.00200 times as acidic
• C) 0.0000630 times as acidic
• D) 501.2 times as acidic

---

Definitions:

Peripheral Nervous System

Part of the nervous system outside the brain and spinal cord, responsible for connecting the central nervous system to the rest of the body.

Central Nervous System

The part of the nervous system consisting of the brain and spinal cord, responsible for processing information and coordinating bodily functions.

Somatic Nervous System

A part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles.

Autonomic Nervous System

A part of the peripheral nervous system that controls involuntary bodily functions such as heartbeat, digestion, and breathing.