Double Displacement Reactions: Forming Precipitate Lab Answers

Introduction In this lab, double replacement reactions between compounds were done in order to determine the equation and description of a new substance. During the lab, each participant was given drop bottles, spot plates. The drop bottles contained different compounds which were dropped into the spot plates and mixed together. Compounds were combined together and…

Biological Forms of Energy and Reducing Power

Living organisms carry out a diverse set of tasks, such as building and maintaining physical structures, moving, synthesizing macromolecules, maintaining electrochemical gradients, and maintaining a constant body temperature. All of these processes require energy. One fundamental problem living organisms face is how to obtain energy to carry out these tasks. When considered at their most…

Voltage

Energy can be defined as the ability to do work.  Electrons possess energy and this energy can be converted to another form to do work (make a lightbulb shine, motor run, etc).  This energy is called electric potential energy. Definitions: Electric potential energy:  energy that the battery gives to the electrons; the amount of energy…

Shapes of Molecules

The shape of a molecule determines many of its properties; For example: C4H10 is the formula for 2 separate molecules n-butane and isobutene Melting Point    -138°C                   -159°C Boiling Point     -0.5°C                    -12°C Enzymes—shape compatible with those molecules whose reactions they promote i.e.  the enzyme sucrase breaks down the sugar molecule sucrose The shape of a…

Enthalpy Change

Enthalpy change is also known as heat of reaction, enthalpy of reaction, change in heat content. Enthalpy = total energy of a system It is impossible to measure the total kinetic and potential energy of a system, so instead we measure enthalpy change (using calorimeters). Enthalpy Change –  is the energy absorbed from or released…