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相关概念视频

Problem-Solving01:29

Problem-Solving

103
Effective problem-solving consists of two steps: 1. identifying the problem and 2. selecting the appropriate problem-solving strategy (i.e., a plan of action used to find a solution). Humans use four problem-solving strategies:
103
The Small x Assumption02:20

The Small x Assumption

45.6K
If a reaction has a small equilibrium constant, the equilibrium position favors the reactants. In such reactions, a negligible change in concentration may occur if the initial concentrations of reactants are high and the Kc value is small. In such circumstances, the equilibrium concentration is approximately equal to its initial concentration.  This estimation can be used to simplify the equilibrium calculations by assuming that some equilibrium concentrations are equal to the initial...
45.6K
SN2 Reaction: Mechanism02:27

SN2 Reaction: Mechanism

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The kinetic studies of SN2 reactions suggest an essential feature of its mechanism: it is a single-step process without intermediates. Here, both the nucleophile and the substrate participate in the rate-determining step.
The presence of the more electronegative halogen in the substrate creates a polarized carbon-halide bond. The halide pulls the electron cloud generating an electrophilic center at the carbon atom. Thus, the carbon atom carries a partial positive charge while the halide has a...
13.8K
Predicting Reaction Outcomes02:24

Predicting Reaction Outcomes

7.8K
Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...
7.8K
Calculating Equilibrium Concentrations02:05

Calculating Equilibrium Concentrations

47.0K
Being able to calculate equilibrium concentrations is essential to many areas of science and technology—for example, in the formulation and dosing of pharmaceutical products. After a drug is ingested or injected, it is typically involved in several chemical equilibria that affect its ultimate concentration in the body system of interest. Knowledge of the quantitative aspects of these equilibria is required to compute a dosage amount that will solicit the desired therapeutic effect.
A more...
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Leveling Effect and Non-Aqueous Acid-Base Solutions02:11

Leveling Effect and Non-Aqueous Acid-Base Solutions

7.9K
This lesson defines the leveling effect in acidic and basic solutions and its role in aqueous and non-aqueous solutions. It is essential to understand the competing nature of various species in a chemical system.
The Leveling Effect of a Solvent
A generic acid (HA) reacts with the generic base (B-) to yield the corresponding conjugate base (A-) and conjugate acid (HB):
7.9K

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相关实验视频

Updated: May 17, 2025

Problem-Solving Before Instruction PS-I: A Protocol for Assessment and Intervention in Students with Different Abilities
10:26

Problem-Solving Before Instruction PS-I: A Protocol for Assessment and Intervention in Students with Different Abilities

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解决问题的视频一般化学审查:学生的感知和使用模式.

Michelle Richards-Babb1, Reagan Curtis2, Valerie J Smith1

  • 1C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States.

Journal of chemical education
|March 31, 2025
PubMed
概括
此摘要是机器生成的。

解决问题的视频 (PSV) 被一般化学学生高度重视为考试准备,与传统的复习课程相比,它提供了更好的实用性. 学生喜欢这些视频的逐步解释和自动学习功能.

关键词:
化学教育研究 化学教育研究丰富/审查材料一年级本科/一般类基于多媒体的学习

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相关实验视频

Last Updated: May 17, 2025

Problem-Solving Before Instruction PS-I: A Protocol for Assessment and Intervention in Students with Different Abilities
10:26

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Modeling an Enzyme Active Site using Molecular Visualization Freeware
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Optimization of the Ugi Reaction Using Parallel Synthesis and Automated Liquid Handling
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科学领域:

  • 化学教育 化学教育
  • 教育技术的教育技术

背景情况:

  • 传统的通用化学课程通常依赖于讲座和复习课程.
  • 学生参与和有效的学习策略对于化学成功至关重要.
  • 解决问题的视频 (PSV) 为现有教学方法提供了潜在的替代方案或补充.

研究的目的:

  • 评估解决问题的视频 (PSV) 的有效性,以取代一般化学考试复习会.
  • 了解学生对PSV在支持化学内容学习中的实用性的看法.
  • 调查学生如何利用PSV来增强他们的学习过程.

主要方法:

  • 学生调查评估各种课程组件的感知有用性,包括PSV.
  • 对PSV的学生观看模式的分析.
  • 使用YouTube分析的PSV视图与考试时间表的相关性.

主要成果:

  • 学生们认为PSV比教科书和传统的考试复习会更有用.
  • 人们经常查看PSV,通常是多次,主要是为了考试准备.
  • 学生发现的关键好处包括逐步解释和对学习步伐的控制.
  • 据YouTube数据证实,PSV观众的峰值发生在考试前和考试期间.

结论:

  • 学生们认为PSV是通用化学学习和考试准备的高效工具.
  • 整合PSV可以优化课堂时间,用于更高层次的思考活动,如积极学习和小组工作.
  • 这些发现支持PSV的战略实施,以提高学生化学学习成果.