What is the primary measure of how quickly a chemical reaction occurs?

The rate of reaction

In the reaction between magnesium ribbon and dilute sulfuric acid, what gas is produced?

Hydrogen gas (H₂)

True or False: The rate of reaction remains constant throughout a chemical reaction.

False. The rate of reaction changes as reactants are consumed and products are formed.

Riddle: I'm a solid that burns bright when small, but not at all when large. What am I?

Magnesium

Fill in the blank: The effect of temperature on reaction rates can be explained by ______.

Particle theory

Which of the following factors does NOT affect the rate of reaction? A) Surface area B) Temperature C) Color D) Concentration

C) Color

What happens to the slope of a graph as a reaction progresses and approaches completion?

The slope flattens, indicating a slower reaction rate.

True or False: Higher concentrations of reactants lead to a slower reaction rate.

False. Higher concentrations increase the frequency of collisions, speeding up the reaction.

Fill in the blank: In the reaction between sodium thiosulfate and hydrochloric acid, a ______ precipitate forms, indicating the reaction's progress.

Sulfur precipitate

What effect does increasing the surface area of a solid reactant have on the rate of reaction?

It increases the rate of reaction.

Riddle: I am a gas produced when acids react with carbonates, and I can cause bubbling. What am I?

Carbon dioxide (CO₂)

What is the average rate of reaction calculated from the volume of gas produced over time?

It is the volume of gas produced divided by the time taken.

True or False: The total volume of gas produced in a reaction increases with higher temperatures.

False. Higher temperatures result in the same volume of gas produced more quickly, not an increased total volume.

Which factor primarily explains the increase in reaction rate with temperature?

The increased movement and collision frequency of particles.

Fill in the blank: The reaction rate can be measured by the amount of ______ formed or reactant consumed over time.

Product