Rates of Reactions (Junior Cert Science): Flashcards

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Rates of Reactions
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Rate of reaction definition

Change in concentration per unit time

Test for hydrogen gas

Burns with a pop sound

Test for carbon dioxide

Turns limewater milky

Test for oxygen gas

Relights a glowing splint

Effect of smaller particle size on rate

Increases rate (greater surface area for collisions)

Effect of higher concentration on rate

Increases rate (more particles, more collisions)

Effect of higher temperature on rate

Increases rate (more energy, more frequent collisions)

Catalyst definition

Speeds up reaction without being used up

Enzyme definition

Biological catalyst

Steep slope on rate graph meaning

Fast reaction rate

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