# What is the rate of the reaction if a is doubled?

Table of Contents

- 1 What is the rate of the reaction if a is doubled?
- 2 What is rate of reaction formula?
- 3 Does doubling the temperature double the reaction rate?
- 4 How do you find the rate?
- 5 How concentration affect the rate of reaction?
- 6 How is the rate of reaction affected if the concentration of B is quadrupled?
- 7 How do you find the rate constant for second order reactions?
- 8 What is the reaction rate law and reaction order?

## What is the rate of the reaction if a is doubled?

If the concentration of A is doubled, the reaction rate doubles; if the concentration of A is increased by a factor of 10, the reaction rate increases by a factor of 10, and so forth.

## What is rate of reaction formula?

The rate could be expressed in the following alternative ways: d[Z]/dt, –d[A]/dt, –d[B]/dt, dz/dt, −da/dt, −db/dt where t is the time, [A], [B], and [Z] are the concentrations of the substances, and a, b, and z are their amounts. Note that these six expressions are all different from one another but are simply related.

**What will happen to the reaction rate if the concentration of A is tripled?**

In a third order reaction with two reactants, if you triple the concentration of one of the reactants, the rate increases by a factor of 3.

**Does doubling the concentration double the reaction rate?**

When you double the concentration the rate doubles. The rate is proportional to the square of the concentration of a reactant. When you double the concentration the rate goes up four times.

### Does doubling the temperature double the reaction rate?

As you increase the temperature the rate of reaction increases. As a rough approximation, for many reactions happening at around room temperature, the rate of reaction doubles for every 10°C rise in temperature.

### How do you find the rate?

Use the formula r = d/t. Your rate is 24 miles divided by 2 hours, so: r = 24 miles ÷ 2 hours = 12 miles per hour.

**How do you calculate K for a reaction?**

To determine K for a reaction that is the sum of two or more reactions, add the reactions but multiply the equilibrium constants. The following reactions occur at 1200°C: CO(g)+3H2(g)⇌CH4(g)+H2O(g) K1=9.17×10−2.

**What is rate constant k?**

The specific rate constant (k) is the proportionality constant relating the rate of the reaction to the concentrations of reactants. A large value of the rate constant means that the reaction is relatively fast, while a small value of the rate constant means that the reaction is relatively slow.

## How concentration affect the rate of reaction?

Increasing the concentration of one or more reactants will often increase the rate of reaction. This occurs because a higher concentration of a reactant will lead to more collisions of that reactant in a specific time period.

## How is the rate of reaction affected if the concentration of B is quadrupled?

The k is the rate constant which varies reaction to reaction so for this reaction its value will be different. It is clearly visible that the rate is increased four times when the concentration of B is doubled. Therefore, the overall order of the reaction will be 2.

**What are the units of K in the rate equation?**

The units of k depend on the overall order of reaction. It must be worked out from the rate equation 2. The value of k is independent of concentration and time. It is constant at a fixed temperature.

**What is the overall rate equation for this reaction?**

The overall rate equation is r = k [A] [B]2 The reaction is 3rdorder overall and the unit of therate constant =mol-2dm6s-1 Working out orders when two reactant concentrations are changed simultaneously

### How do you find the rate constant for second order reactions?

For second order: the rate of reaction is proportional to the concentration of A squared r = k[A]2. The rate constant (k) 1. The units of k depend on the overall order of reaction. It must be worked out from the rate equation 2. The value of k is independent of concentration and time.

### What is the reaction rate law and reaction order?

Rate Law & Reaction Order The reaction rate law expressionrelates the rate of a reaction to the concentrations of the reactants. Each concentration is expressed with an order (exponent). The rate constant converts the concentration expression into thecorrect units of rate (Ms−1). (It also has deeper significance, which will be discussed later)