The rate of reaction can be quantified by measuring the ___ formed or ___ used up in a given time period.

Product; reactant

True or False: The production of hydrogen gas in the reaction between magnesium ribbon and dilute sulfuric acid indicates that a reaction is occurring.

True

In the magnesium-sulfuric acid reaction, how does the rate of hydrogen gas production change over time?

It starts rapidly but slows down and eventually stops as the reaction progresses.

Fill in the blank: Measuring the ___ of the flask every 30 seconds during the reaction between calcium carbonate and hydrochloric acid shows a rapid decrease in mass.

Mass

What type of graph is used to analyze the rate of reaction?

Riddle: I am produced when magnesium meets sulfuric acid, and I escape as bubbles. What am I?

Hydrogen gas

True or False: The rate of reaction remains constant throughout the entire process.

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

Fill in the blank: A syringe attached to a flask can be used to collect ___ gas during the magnesium-sulfuric acid reaction.

Hydrogen

Short Answer: What happens to the volume of gas produced as the reaction between magnesium and sulfuric acid progresses?

The volume of gas produced initially increases rapidly, then slows down before stopping.

What indicates that a reaction is taking place in the reaction between calcium carbonate and hydrochloric acid?

The production of carbon dioxide gas and the decrease in mass of the flask.

What does the steepness of the slope in a reaction graph indicate about the reaction rate?

The reaction between calcium carbonate and hydrochloric acid shows the fastest reaction rate at the ___ of the graph.

Start

True or False: A level graph indicates that the reaction is ongoing and products are still being produced.

Calculate the average rate of reaction if 20 cm³ of carbon dioxide is produced in 20 seconds.

The average rate of reaction is 1 cm³ per second.

Fill in the blank: The particle theory explains that for a reaction to occur, reactant particles must collide with sufficient ___ to react.

Energy

Riddle: I start out plentiful and collide with great frequency, but as I react, I become fewer and slower. What am I?

Reactant particles in a chemical reaction.

How does the number of unreacted particles affect the rate of product formation as a reaction progresses?

True or False: Once all reactant particles have reacted, the reaction will continue to produce products indefinitely.

False. Once all reactant particles have reacted, the reaction stops and produces no more products.

Fill in the blank: In the graph of the copper carbonate and hydrochloric acid reaction, the volume of carbon dioxide is plotted against ___ to analyze the reaction rate.

Time

What happens to the reaction rate as a chemical reaction approaches completion?

The reaction rate decreases, ultimately reaching zero when no reactant particles remain to react.

The rate of reaction is significantly affected by the ___ of a reactant.

Surface area

True or False: Magnesium powder reacts with oxygen faster than magnesium ribbon because it has a smaller surface area.

False: Magnesium powder reacts faster because it has a larger surface area.

In the reaction between hydrochloric acid and sodium thiosulfate, what does the formation of a cloudy precipitate indicate?

It indicates the progress of the reaction.

Riddle: I can be large or small, but cutting me into pieces makes me react faster. What am I?

A solid reactant

Fill in the blank: Smaller pieces of a solid always react faster than larger pieces because cutting a solid increases its total ___ .

Surface area