# What is the equation for relating concentration to time for a second order reaction?

## What is the equation for relating concentration to time for a second order reaction?

The order of the reaction is second, and the value of k is 0.0269 M-2s-1. Since the reaction order is second, the formula for t1/2 = k-1[A]o-1. This means that the half life of the reaction is 0.0259 seconds….

1/Concentration(M-1) | Time (s) |
---|---|

2 | 20 |

3 | 30 |

## How do you find concentration from a time graph?

We determine an instantaneous rate at time t:

- by calculating the negative of the slope of the curve of concentration of a reactant versus time at time t.
- by calculating the slope of the curve of concentration of a product versus time at time t.

**What is the equation for a second order reaction?**

Second order reactions can be defined as chemical reactions wherein the sum of the exponents in the corresponding rate law of the chemical reaction is equal to two. The rate of such a reaction can be written either as r = k[A]2, or as r = k[A][B].

### How do you calculate change in concentration?

Measuring Reaction Rates

- Reaction rate is calculated using the formula rate = Δ[C]/Δt, where Δ[C] is the change in product concentration during time period Δt.
- The rate of reaction can be observed by watching the disappearance of a reactant or the appearance of a product over time.

### How do you find initial concentration?

How to Calculate Initial Concentrations

- Weigh the amount of solute (the compound being dissolved) in grams.
- Measure the amount of the solvent that you have.
- Divide the moles of solute found in Step 1 by the liters of solvent found in Step 2 to find the initial concentration of a solution.

**What causes a second-order reaction?**

A second order reaction is a type of chemical reaction that depends on the concentrations of one-second order reactant or two first-order reactants. This reaction proceeds at a rate proportional to the square of the concentration of one reactant, or the product of the concentrations of two reactants.

#### How is concentration time related to order of reaction?

The concentration time graph will be a curve which is similar to first order reaction. Half life of second order reaction is not a constant, so we can use this to differentiate second order reaction from first order reaction.

#### How to calculate the rate of a second order reaction?

For a second order reaction,as shown in the following figure, the plot of 1/[A] versus time is a straight line with k = slope of the line. Other graphs are curved for a second order reaction. Top

**How to calculate rate laws from graphs of concentration versus time?**

For a first order reaction,as shown in the following figure, the plot of the logrithm of [A] versus time is a straight line with k = – slope of the line. Other graphs are curved for a first order reaction. For a second order reaction,as shown in the following figure, the plot of 1/[A] versus time is a straight line with k = slope of the line.

## What is the equation for the half life of second order reactions?

Therefore, the required equation for the half life of second order reactions can be written as follows. This equation for the half life implies that the half life is inversely proportional to the concentration of the reactants. What is meant by the second-order reaction?