연구실: 화학
JoVE 비디오를 활용하시려면 도서관을 통한 기관 구독이 필요합니다. 전체 비디오를 보시려면 로그인하거나 무료 트라이얼을 시작하세요.
JoVE 비디오를 활용하시려면 도서관을 통한 기관 구독이 필요합니다. 전체 비디오를 보시려면 로그인하거나 무료 트라이얼을 시작하세요.
At the end of this lab, students should know...
The reaction rate is a measure of the speed of a chemical reaction, and it is described as the change in concentrations over time. Reaction rate is affected by the concentration of the reactants, the temperature, pressure, and the state of matter of the reactants.
A reaction’s rate law is an experimentally determined relationship between the concentration of the reactants raised to their reaction order times the reaction rate constant, k. The constant k is temperature-dependent.
The activation energy of a reaction is the amount of energy required for a chemical reaction to occur. If a chemical reaction does not meet this threshold of energy, it will not take place.
The reaction rate constant, k, and activation energy of a chemical reaction are related by the Arrhenius equation. This equation states that the rate constant is dependent on the temperature and activation energy of a chemical reaction.
A catalyst facilitates a chemical reaction by lowering the activation energy required. The catalyst is not consumed by the chemical reaction. Catalysts increase the rate of a reaction but do not affect the yield of the reaction.
Source: Smaa Koraym at Johns Hopkins University, MD, USA
Here, we show the preparation of a solution for 10 students working in pairs, with some excess. Please adjust quantities as needed.
1 20-mL volumetric pipette |
1 Pipette controller |
1 50-mL beaker |
1 100-mL beaker |
3 400-mL beakers |
1 600-mL beaker |
1 125-mL Büchner flask |
1 Roll of lab tape |
1 Labeling pen |
1 Glass thermometer |