The Concentration of H₃O⁺ in a Solution Is 7 $\times$ 10^-4 M at 25°C

question 17

Multiple Choice

The concentration of H₃O⁺ in a solution is 7 $\times$ 10^-4 M at 25°C.What is its hydroxide-ion concentration? (K_w = 1.01 $\times$ 10^-14)

• A) 7 \(\times\) 10^-4 M
• B) 1 \(\times\) 10^-10 M
• C) 2 \(\times\) 10^-10 M
• D) 3 \(\times\) 10^-10 M
• E) 1 \(\times\) 10^-11 M

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Definitions:

Probability

A quantification of the probability of an event happening, indicated by a value ranging from 0 to 1, with 0 meaning the event cannot happen and 1 meaning the event is certain to happen.

Standard Deviation

A statistic that measures the dispersion or variability of a dataset relative to its mean, indicating how spread out the values are.

Simple Random Sample

An evenly selected portion of a wider population, with each participant having an equal opportunity to be chosen.

Sample Size

The number of observations or data points collected in a statistical study, which impacts the study's accuracy and conclusions.