In Aqueous Solution, Hypobromite Ion, BrO^-, Reacts to Produce Bromate

question 47

Multiple Choice

In aqueous solution, hypobromite ion, BrO^-, reacts to produce bromate ion, BrO₃^-, and bromide ion, Br^-, according to the following chemical equation: 3BrO^-(aq) → BrO₃^-(aq) + 2BR^-(aq)
A plot of 1/[BrO^-] vs. time is linear and the slope is equal to 0.056 L mol^-1 s^-1. If the initial concentration of BrO^- is 0.80 mol L^-1, how long will it take one-half of the BrO^- ion to react?

• A)4.5 × 10^-2 s
• B)7.1 s
• C)12 s
• D)22 s

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Definitions:

Smoothing Constant

A parameter used in exponential smoothing models to weight recent observations more heavily than older ones for forecasting purposes.

Exponential Smoothing

Exponential smoothing is a time series forecasting method for smoothing data values, giving more weight to recent observations while factoring in older data.

Moving Average

A statistical technique used to analyze time series data by creating a series of averages of different subsets of the full data set.

Trend Line

A line drawn through data points in a scatter plot to model the direction or pattern of the data, commonly used in time series data to visualize trends.