Rates of Reaction 10Chem

What can be used to measure the rate of reaction ?

• Volume in centimeters cubed per minute

• Mass in grams per second

• Time in seconds

• Volume in liters per minute

How do you find the rate of reaction at a specific point on a graph?

• By measuring the area under the curve

• By calculating the total volume of reactants

• By drawing a tangent at the point of interest

• By observing the color change

What happens to the mass in a reaction where gas is produced from solid reactants?

• It increases

• It remains constant

• It decreases

• It doubles

Which method can be used to follow the rate of reaction by observing a color change?

• Reaction between sodium thiosulfate and hydrochloric acid

• Measuring electrical conductivity

• Measuring pH change

• Observing temperature change

What is the effect of temperature on the rate of reaction?

• Increases the rate of reaction

• Decreases the rate of reaction

• No effect

• Changes the color of the reaction

What does a catalyst do in a chemical reaction?

• Increases the activation energy

• Decreases the activation energy

• Acts as a reactant

• Changes the color of products

What is the symbol for a reversible reaction?

• A plus sign

• A half arrow on top of another half arrow going in the opposite direction

• A double-headed arrow

• A single arrow

What principle states that a reversible reaction will adjust itself in response to a change in conditions?

• Newton's third law

• Le Chatelier's principle

• Dalton's law

• The principle of conservation of mass

What happens to the rate of reaction when the concentration of reactants is increased?

• It decreases

• It stops

• It remains the same

• It increases

What is the relationship between surface area and rate of reaction?

• Random relationship

• Inverse relationship

• No relationship

• Direct relationship