Why does steel wool ignite when exposed to air?

As a result of the chemical reaction with oxygen in the air.

Due to the high water content in steel wool.

Because of the friction between air molecules and steel wool.

Because steel wool contains flammable chemicals.

What lab safety measures are important while conducting the steel wool experiment? Choose all correct answers.

Wearing a lab coat and safety goggles.

Keeping a fire extinguisher nearby.

Ensuring the lab is at the correct temperature.

Using a stopwatch to time the reaction.

How does the amount of hydrogen peroxide affect the foam produced in the reaction during elephant toothpaste experiment?

More hydrogen peroxide increases the size and intensity of the foam

More hydrogen peroxide decreases the size and intensity of the foam

The amount of hydrogen peroxide has no effect on the foam

Less hydrogen peroxide increases the size and intensity of the foam

What role does a catalyst play in a chemical reaction?

It increases the reaction rate without being consumed

It changes the color of the reaction mixture

It is the main reactant in the reaction

In the Elephant Toothpaste experiment, Why does the foam expand and rise rapidly during the reaction?

Because of the rapid release of a gas

Because of the decrease in temperature

Due to the rapid formation of a solid

What changes did you notice in the apple as it reacted with baking soda and vinegar?

The apple changed color and texture

In what part of the experiment did a chemical reaction occur?

When baking soda and vinegar came into contact with the apple

When the apple was cut into pieces

After the experiment was completed

How does the acidity of the vinegar affect the reaction with the baking soda?

It has no effect on the reaction

Why did it erupt when it comes into contact with baking soda and vinegar?

Due to the pressure from the container

What is required for particles to react according to the collision theory?

They must collide with sufficient energy, known as the activation energy.

They must be of the same element.

They must be in a liquid state.

They must collide with less energy than the activation energy.

How does increasing the temperature affect the rate of a chemical reaction?

Increases the energy of particles, leading to more frequent and energetic collisions.

Has no effect on the rate of reaction.

Increases the size of the particles.

Decreases the energy of particles, reducing collision frequency.

What is the effect of increasing the surface area on the rate of reaction?

Increases the frequency of collisions, thus increasing the rate of reaction.

Increases the time needed for the reaction to complete.

Has no effect on the reaction rate.

Decreases the rate of reaction.

What role does a catalyst play in a chemical reaction?

It provides an alternative pathway with lower activation energy, increasing the rate of reaction.

It decreases the number of successful collisions.

It increases the activation energy required for the reaction.

It acts as a reactant in the chemical equation.

Which of the following is a common source of catalysts?

Transition metals like cobalt and nickel

Alkali metals like lithium and sodium

Noble gases like helium and neon

Non-metallic elements like oxygen and sulfur

Factors Affecting Rate of Reaction

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Factors Affecting Rate of Reaction

22 questions

The higher the concentration of a solution, the __________ the rate of reaction.

The larger the surface area, the __________ the rate of reaction.

At higher temperatures, the particles have more __________ energy, so __________ more frequently.

Catalysts increase the rate of reaction but are not __________.

The greater the mass of catalyst, the __________ the rate of reaction.

What observation might you expect when steel wool reacts with oxygen?

What factors affect the rate of reaction in the steel wool and oxygen experiment?

Why does steel wool ignite when exposed to air?

What lab safety measures are important while conducting the steel wool experiment? Choose all correct answers.

What changes might be observed in the mixture as the reaction proceeds during the elephant toothpaste experiment?

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At higher temperatures, the particles have more energy, so more frequently.