Creado por Evie Papanicola
hace alrededor de 11 años
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Pregunta | Respuesta |
What is the Reaction Time? | The time taken between a reaction starting and stopping. |
What is a Reactant? | A substance that takes part in a chemical reaction. Reactants are written on the left hand side of a chemical equation. |
What is Excess Reactant? | A reactant that is not all used up in a reaction that uses all of another reactant is said to be in excess. |
What is Limiting Reactant? | Reactant that is completely used up in a reaction and so determines how much product can be made. |
What is the rate of reaction controlled by? | The number of effective collisions occurring per second |
Explain what increasing the concentration of reactants does. | More particles in the same volume will bump into each other more often. |
Explain what increasing the temperature does. | The particles move more quickly, which means they collide more often. They also collide with more energy. |
Explain what increasing the surface area does. | It allows more surface to come into contact with the other reactants. |
How does a catalyst help speed up a reaction? | It provides an alternative route for the reaction to occur by. |
Rate | Amount of change in the dependent variable/time measured for |
What is a catalyst? | A catalyst increases the speed of a reaction, without being chemically changed or used up in the reaction. |
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