Phosphorescent Decay
Overview: In this activity you will measure the phosphorescence over time of a glow-in-the-dark paint following excitation by a flash of light. Then the data is transferred to Excel to find the best fit curve and its equation. This provides an insight into reaction order and methods for studying emissive processes. phosphorescent decay lesson Essential Question: What reaction order do you predict the phosphorescent emission from glow in the dark paper will follow? What affect will temperature have on the phosphorescent decay pattern? Background: Fluorescence vs Phosphorescence Many materials exhibit fluorescence when they are excited by a sufficiently energetic light source. In an excited material a population of electrons and holes is...
Polymers
[vc_row][vc_column][mkd_section_title title="Polymers" title_size="large" title_color="" title_text_align="" margin_bottom="" width=""][vc_column_text]By Monica Esopi The intention of this lesson is to learn background about polymer materials and their applications, and to explore these materials through hands-on activities (making slime and bouncy balls). Students will be able to make their own polymers and explore their properties. These activities can be done individually, or in pairs or groups. Students will make slime to explore cross-linking, and then make bouncy balls to see the impact of a thickening agent.[/vc_column_text][vc_empty_space height="30px"][vc_hoverbox image="18213" primary_title="" primary_align="left" hover_title="QUESTION" shape="square" el_width="30" align="left"]How can simple molecules be joined together in chains or networks to make a substance with different...
Electrochemical Chameleon
[vc_row][vc_column][mkd_section_title title="Electrochemical Chameleon" title_size="large" title_color="" title_text_align="" margin_bottom="" width=""][vc_column_text]By Katie Corp - Schlenker Research Group Students experiment with acidity of solutions and then use electricity to split water into hydrogen and oxygen and observe changes in the solution.[/vc_column_text][vc_empty_space height="30px"][vc_hoverbox image="18210" primary_title="" primary_align="left" hover_title="QUESTION" shape="square" el_width="30" align="left"]How can water be split into its simple elements?[/vc_hoverbox][vc_empty_space height="40px"][mkd_accordion style="boxed_toggle" el_class="GLOWING COLORS"][mkd_accordion_tab icon_pack="" title="Background"][vc_column_text]One way to produce hydrogen gas and oxygen gas for energy storage is water splitting via electrolysis. Electrolysis is a process of using an electrical current to drive a chemical reaction that would otherwise not happen, or is non-spontaneous. In this lab, we will electrolyze normal tap...
Aluminum Air Battery
[vc_row][vc_column][mkd_section_title title="Aluminum Air Battery" title_size="large" title_color="" title_text_align="" margin_bottom="" width=""][vc_column_text]Storing energy is one of the biggest challenges facing the scaling up of clean energy technologies. The goal of this activity is to allow students to design and build a battery using their understanding of oxidation and reduction reactions. Students will use everyday materials, including aluminum foil, salt water, charcoal, and copper foil, to build a non-rechargeable battery cell capable of powering an LED. Students should be familiar with balancing equations using half-reactions. Essential Questions: Can energy be captured and stored? How can we capture the energy released from a chemical reaction to produce useful electrical power?[/vc_column_text][/vc_column][/vc_row][vc_row][vc_column][mkd_accordion style="toggle"][mkd_accordion_tab icon_pack=""...
A Battery from Household Chemicals
Background We use batteries to power lots of different things, from TV remotes to computers. Some cars even run on batteries instead of gasoline! So where does all that power come from? All batteries, big and small, get their power from chemical reactions happening inside of them. When certain types of chemicals react, they give up electrons which we harness to produce electrical power. When you turn on a laptop computer, or press a button on a TV remote, you’re making chemistry happen! While the two ends of the battery are connected, and electricity is flowing, the chemicals can react until they’re all used up,...
