Cell Voltage - Directions

Using the Cell Voltage Concept Builder is quite simple. Each question in the three difficulty levels involves the same task - identifying the reduction and oxidation half-equation, the associated reduction and oxidation potential, and the overall cell voltage. Each question presents a galvanic cell diagram showing the components of each half-cell. The half-equations can be selected from among four choices. The selection is done by tapping on the Tap Me! field to toggle through the four options. The number pad for numeric entry must be closed in order to tap on the half-equation fields. Values for the reduction potential, oxidation potential, and cell voltage can be entered using our built-in number pad. Tapping on the field will pop-up the number pad on the side margin. Tapping on the numeric buttons will enter answers into the answer fields. You can switch to a different entry field by simply tapping on it. Use the Table of Reduction Potentials to help with determining the voltage values.

Once two half-equations have been selected and the three numeric answers entered, a Check Answer button will be visible. When you are satisfied with your answers, you can tap on the Check Answer button. Your answers will be evaluated and your Progress Report will be updated (visible for Task Tracker users only).

Your goal is to earn "Stars" and to complete one or more difficulty levels. Stars are earned when you show success on a particular question. If you miss a question then you will have to answer two similar questions correctly before earning a star. Once you show success on all the questions for a particular difficulty level, you will earn the trophy for that difficulty level.