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

question 139

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
-Find the pH value of a sample of lake for which [ $\left[ \mathrm { H } ^ { + } \right] = 0.00000000305$ Round to the nearest tenth.

• A) 7.3
• B) 8.5
• C) 10.1
• D) 6.4

---

Definitions:

Hyperactive Children

Children who exhibit higher than normal levels of activity and/or impulsivity that may interfere with their ability to complete tasks or engage socially.

Self-directed Speech

Internal or out-loud conversation one has with oneself, often used for self-guidance or problem-solving.

Self-control

The capacity to control our feelings, thoughts, and actions when confronted with challenges and spontaneous desires.

Contrast Assumption

The assumption that objects have only one label. Also known as the mutual exclusivity assumption (if a word means one thing, then it cannot mean another).