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

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