Solubility Design Lab The Scientific Method Solutions Homogenous

Solubility Design Lab The Scientific Method

Solutions • Homogenous mixture that can contain two or more substances – Solute: substance that is being dissolved – Solvent: substance in greater quantity, solute dissolves within it Solid-liquid solution: Kool-Aid drink Gas-gas solution: Air! Solid-solid solution: Steel

“Like dissolves like”

What does polar mean? • A molecule or substance is said to be polar when atoms form a covalent bond in which the electrons are not shared equally. • This causes one end of the molecule to be slightly positive, and the other to be slightly negative.

So…how does this work? • Opposites attract: Negative side end of water molecule is attracted to the positive end of the sugar molecule & vice versa • Water molecules come into contact with sugar molecules • The charged poles of the H 2 O molecules will pull the poles of other molecules until all the two substances are evenly mixed

What affects solubility? • Solubility = the ability of a substance to dissolve • Factors affecting it: – Agitation: allows new collisions between the solute and solvent particles to occur – Surface area: breaking the solute into smaller pieces increases the surface area. More surface area allows for more collisions – Temperature: particles moving quicker, collisions occur more often

LAB GROUPS • You will be working in a group of 3 • Write your group members names at the top of the handout (including yours) • Each person will be responsible for submitting a lab handout with the conclusion questions answered • During the lab itself, each person will have a job. • Timer: Start the timer when begin stirring; Stop the timer when stop stirring • Stirrer: Stirs the solution • Recorder: Records the time for each trial

Honors Chemistry Period 1 1 2 3 4 5 Daniel Jeff Emilia Alejandro Jesus Fallyn Destiny Frank Bennett Grant Daniela Evan Zoe Michelle Abby 6 7 8 9 10 11 Oscar Seth Claudia Isabella Chevelle Alex Sarah Matt Carolina Zach Martin Freddy Robert Angela Connor Alondra Rachel Celeste

Chemistry Period 2 1 2 3 4 5 Alberto Nathan Aaron Anthony Perla Brandon Ky Monica Josh Ariel Vanya Demyrah Giana Yetzy Neomy 6 7 8 9 10 Justin Nathaniel Iris Aldo Wendy Jessica Eduardo Alexxia John Jesus Anne Osiris Alyssa Daisy Daniel

Chemistry Period 4 1 2 3 4 5 Kierstin Grace Elijah Hector Joanna Kash Anthony Cassandra Destiny Ivan Kaedyn Gio Jackson Gisell Paulina 6 7 8 9 Nia Shiela Jonathon Rudy Keeia Victoria Lizbeth Willie Xavier Jazmine Bradley

Honors Chemistry Period 6 1 2 3 4 Pablo Noah Anna Hayhay Bryan Banesa Becca Manny Gabriel Kevin Aide Jaime Eduardo Julie Daniel 6 7 8 Hales Javier Cece Manuel C Yenashi Mavrick Toby Matt Manuel V Gustavo Noah Kaylah Memo Twyea 9 5 10

Chemistry Period 7 1 2 3 4 5 6 7 Jacqueline Gabby Sergio Carlos Val Lizbeth Kindrel Jairo Rosie Jose Cameron Susan Samuel Yoselin Maddy Gio Rebeca Andrea Tristan Valentine