Rates of reaction

Rates of reaction

What happens to the rate of reaction when the concentration of reactants increases?

1. The rate of reaction fluctuates
2. The rate of reaction increases
3. The rate of reaction remains the same
4. The rate of reaction decreases

How does increasing the concentration of reactants affect the frequency of successful collisions?

1. It causes random variations in the frequency of successful collisions
2. It decreases the frequency of successful collisions
3. It has no effect on the frequency of successful collisions
4. It increases the frequency of successful collisions

What impact does a higher concentration of reactants have on the reaction rate?

1. It speeds up the reaction rate
2. It slows down the reaction rate
3. It has no effect on the reaction rate
4. It makes the reaction rate unpredictable

Why does an increase in reactant concentration lead to a faster reaction rate?

1. There are more reactant particles to collide
2. The temperature decreases, causing a faster reaction rate
3. The reactant particles become less reactive
4. The reaction becomes more complex

What is the relationship between reactant concentration and reaction rate?

1. They have a direct proportional relationship
2. They have no relationship
3. They have an inverse proportional relationship
4. The relationship is chaotic and unpredictable

What is the effect of increased pressure on the rate of reaction?

1. Has no effect on the rate of reaction
2. Increases the rate of reaction
3. Causes the reaction to stop
4. Decreases the rate of reaction

How does pressure influence the rate of reaction?

1. Pressure has no impact on reaction rate
2. Pressure slows down the reaction
3. Lower pressure speeds up the reaction
4. Higher pressure can speed up the reaction

What happens to the rate of reaction when pressure is decreased?

1. The rate of reaction remains constant
2. The rate of reaction decreases
3. The reaction stops completely
4. The rate of reaction increases

What effect does pressure have on reaction rate?

1. Decreasing pressure accelerates the reaction
2. Pressure slows down the reaction
3. Increasing pressure accelerates the reaction
4. Pressure has no effect on reaction rate

How does pressure impact the rate of a chemical reaction?

1. Higher pressure increases the rate of reaction
2. Pressure has no impact on reaction rate
3. Pressure decreases the rate of reaction
4. Lower pressure increases the rate of reaction

What is the formula for calculating rate of concentration change?

1. (Change in concentration) / (Time taken)
2. (Initial concentration) * (Final concentration)
3. (Change in time) * (Final concentration)
4. Time taken / Change in concentration

How is rate of concentration change typically expressed?

1. molarity per hour
2. grams per milliliter per minute
3. moles per liter per minute
4. moles per liter per second

What does a higher rate of concentration change indicate?

1. Slower reaction or diffusion
2. No change in reaction or diffusion
3. Decrease in reaction or diffusion
4. Faster reaction or diffusion

What factors can affect the rate of concentration change?

1. Temperature, surface area, concentration, catalysts
2. Pressure, color, volume, pH level

In a reaction, what does a negative rate of concentration change represent?

1. No change in concentration over time
2. Increase in concentration over time
3. Decrease in concentration over time
4. Constant concentration over time

What happens to the rate of reaction if pressure is increased?

1. It fluctuates
2. It increases
3. It stays the same
4. It decreases

How does pressure affect the rate of reaction?

1. It has no effect
2. It causes explosions
3. It increases the rate
4. It decreases the rate

What is the relationship between pressure and rate of reaction?

1. Exponential relationship
2. Directly proportional
3. No relationship
4. Inversely proportional