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Chapter 16: Problem 7

What unit is most commonly used to express reaction rate?

Short Answer

Expert verified
The unit most commonly used to express reaction rate is Molarity per second (M/s or M.s^-1).

Step by step solution

01

Identify the Parameters Involved in Reaction Rate

The rate of a chemical reaction is defined as the rate of change in concentration of a reactant or product with time. This suggests a time and concentration dimension.
02

Formulate Reaction Rate Unit

The reaction rate unit would thus have time in the denominator (as reaction rate is measured per unit of time). As for the substance's concentration, it can vary, but in many cases we refer to it in molarity (moles of a substance per liter of solution), denoted as M. Combining these, the most common unit for reaction rate is M/s or Molarity per second (M.s^-1).

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Most popular questions from this chapter

Explain why the names activated complex and transition state are suitable for describing the highest energy point on a reaction's route from reactant to product.

Explain the effect that area has on reactions that occur on surfaces.

Use the following terms to create a concept map: activation energy, alternative reaction pathway, catalysts, enzymes, and reaction rate.

Boilers are sometimes used to heat large buildings. Deposits of \(\mathrm{CaCO}_{3}, \mathrm{MgCO}_{3},\) and \(\mathrm{FeCO}_{3}\) can hinder the boiler operation. Aqueous solutions of hydrochloric acid are commonly used to remove these deposits. The general equation for the reaction is written below. $$\begin{array}{c}{\mathrm{MCO}_{3}(s)+2 \mathrm{H}_{3} \mathrm{O}^{+}(a q) \rightarrow} \\ {\mathrm{M}^{2+}(a q)+3 \mathrm{H}_{2} \mathrm{O}(l)+\mathrm{CO}_{2}(g)}\end{array}$$ In the equation, M stands for Ca, Mg, or Fe. Design an experiment to determine the effect of various HCl concentrations on the rates of this reaction. Present your design to the class.

What is the rate of the reaction $$2 \mathrm{NO}(g)+\mathrm{Br}_{2}(g) \rightarrow 2 \mathrm{NOBr}$$ given that the bromine concentration decreased by \(5.3 \times 10^{-5} \mathrm{M}\) during an interval of 38 \(\mathrm{s} ?\)
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